Best:
-C6 Corvette, C5 Corvette, C4 Corvette, very strongly in that order. They feel right to me. There are other cars that they compete with that I'd like to try out, but meh, I'm not made of money. Plus, you can really beat on these Chevy products. They don't have "potential performance if things didn't keep breaking" like other GT cars that cost a lot more.
-CTS, CTS-V, 2003/2004/2006(/7?). Emphasis on the V. Best sedans ever. I'm not a sedan guy, but a CTS could make me a sedan guy. A sedan *drumroll* that you can beat on.
-G35, G37 (ok, so I haven't driven a G37, but I figure it's just the same but a little bit worse because it's newer). Great cars. Umm... they uh... stuff works and is good. Yeah, that about covers everything. They're "very good." Which IMO is very very rare, especially for a new car! The engine is very large and over complicated, but stuff doesn't break. Yay VQ, I can beat on you!
-1999, 2000, 2002 Camaro, 2002 Firebirds (the v8's, because they got the stufffffs). They're cheap and you can get a lot out of them. I'd upgrade the brakes day 1. Built to be beaten on every single day. I wish I'd had some miles under my belt with one of the newer GTOs... hate to just leave them out.
-2003/4 Mustangs, GT, Mach-1, SVT, a little big for my tastes, but they can do what I'd want of a car. You can beat on them their fair share.
-1996 Pathfinder, 2001 Pathfinder - The beatings I've put on these monsters is legendary. I have a hard time believing the beating these transmissions have taken. Congratulations Nissan! Yay VG and VQ!
-199X Nissan 240sx. Not special, but what a car SHOULD BE. Every car manufacturer should take a look at the 240 and make something just like it. Can you imagine a $10,000 RWD econobox? No, you can't, because RWD is now sold as some magical new technology mined from the center of the earth.
-199X Chevy S-10 pickups. Nothing special, but nothing shitty either. Beat on them, and even if stuff does break you can replace it in an hour without the help of a second $100 bill.
-BMW Sedans (the small ones), used to be the 3's, then the 3's became 5 series size and we have the 1 series now that are 3's. The mid 90's ones looked the best, and just about all of them are good. The mid 90's ones are also the least complex (but still overly complex). They do what they should, but they cost more than they should. Keeping them up isn't worth it.
-Volvo 240: What an ugly piece of shi... wait it still runs? Didn't you buy this car 30 years ago? Yeah, I'll help you replace your rotted out motor mounts. The only european car you can afford parts for, which is important, because at 30 years every single part is a "wear part".
-350z, 300z. Well done, Nissan. VQ and VG, respectively. The 350 is a big improvement in every way that I can think of off the top of my head. You can beat on them both. Hooray! Tranny is the weak point, but hey, I put these well below the Mustang and Camaro for that reason.
-199X Porsche 928 - too much money, wayyyy too much money to keep running, but they do what I want a car to. Don't really want to beat on them much. If anything breaks at this point in the game, sell the car. Or junk it. Worst car I've driven that I'd consider good.
-2000 Crown Vic, 2004 Grand Marquis - not the best cars out there, but the only boat of a car I'd ever put a single penny down on. I can drive one of these, then a 7 series BWM and not see a difference. They're both boaty pieces of shit as far as how fun to drive they are, but the Crown Vics cost like a dollar! They're better than everything boaty that's FWD, so that makes them a 98 percentile. Trip car. Trip car. "TRIP CAR! TRIP CAR! TRIP CAR! TRIP CAR!"
Worst:
-Honda ____, 1980-2005ish (haven't driven the very new ones). I've driven many, and I just can't say enough bad things. Name a part of a car... their one of those is bad. Can't get over the weak wobbly frames, the terrible brakes, all the mechanical problems that people swear they don't have, etc. Driving them is annoying as well, because I don't feel like winding them out to 6kRPM just to move along at a normal pace. Have had 2 in the family blow the engine before 500 miles. There just aren't words for the lack of reliability. At least when they die, it's within warranty (fuck you, Mazda and Toyota!). Don't try to beat on any of them, a lot of stuff breaks and they aren't made to be worked on, they're like disposable cars.
-Toyota Corolla, since they went FWD. I've driven a few, and they've all been neck and neck with the Honda Civics for worst cars of all time. Ok, the new ones, possibly worse than new Civics. I have to give Honda credit for one thing, they don't make the new Corolla. I've never driven anything so scary and unstable. The brakes are obviously better than a Honda, but the cars are pieces of shit. I put 2,000 miles on a brand new Corolla, ALL highway miles, and guess what I got out of it? A car that wouldn't start. Piece of !#$(!&#(!@&#*(. The 1.8's die a very quick death, around 20-25k miles. They're like rotaries, only the engine design itself isn't to blame, it's just the build quality... and you don't even have to beat on them for them to die. I really hate all the electronics they put in these things as well. The interior on the Corollas is for people that are 8 feet tall, yet have the legs of a midget. There is not one seat in them where my knees aren't jammed up against something, and yet I always have 2 feet of head room. Why are they so tall?! And btw, never ever ever beat on a Toyota.
-Toyota Echo - because... well Echo, you win all that is bad. Everything bad about every FWD econobox is the absolute worst with you. Well, except...
-VW everything (ranging from very old all models to very new just the convertible thingy): nothing is thought out. Nothing. It's not like Honda and Toyota who will cut corners and ruin a car. VW will spend two to three times as much on a component just to over complicate it or ruin it with worthless technology. Hey guys, we made our engine block weigh 1 pound less than our competition. The cylinder walls are now the worst in history, and the longblock weighs a full 100 pounds more than all our competitors, but look at that 1 pound lighter that the block is! Find a friend with a VW, and take a look at their jack. It's worse than a scissor jack. German engineering, in the trash!
-Lincoln Continental - FWD luxury car. Really, that says it all. But they also have piles of worthless luxury options to annoy you. Like the climate control. You turn the key on a cold day, and it starts blowing all vents to max spin of the fans. So you got that 0 degree air blowing all over you, and the little red light on is, because that air is HOT, right? Ughhhhh! Haha, somebody else mentioned this car.
-Pontiac Grand Am (1999 and 2005 I think), Grand Prix (2007/8?), Chevy Monte Carlo (FWD one, 200X), Chevy Malibu (2000?): pieces of shit. Bad. Cheap though... but bad. Just... blah. Still better than their Hondyota counterparts, but not decent cars either.
In da middle! (boringular mention?)
-199X Cavalier. Sure they're bad, they're FWD! But they're cheaper than everything else. What a total piece of shit car should be. Like, what a really really bad car should be (really-really). Better buy than whatever sells for $25,000 at the Hondyota dealership JUST because they're cheaper and "the same thing" to me.
-199X Taurus, both generations (I've driven 4 or 5, no idea on the years, they all look the same). Cheapest 6 cylinder sedan you could get. What's wrong with them? Well, nothing is right with them other than they're "ok to drive" and really cheap. Not the most reliable car ever, but not unreliable like the "quality" machines other people put out that were more expensive. If you had to have an automatic FWD sedan, this was the best choice.
-1996-2003 Maxima, all those generations. Best FWD sedans ever made, by a large margin. More expensive than the Taurus, so... whichever works for you and you're willing to pay.
-Late 80's Camry - yeahh, bitch ran forever. Terrible car the whole way, but at least it didn't break like the new ones. It was FWD, so it doesn't get into the "best cars" list with the Volvo 240.
Edited as I read the thread over, I'm reading what other people have driven and writing in which I've driven if they apply. Most are in between and forgettable.