So over a week later, I'm still liking it a lot. Versus is probably the best part, except it gets irritatingly hard sometimes for horde players who don't work well together. The regular campaign has gotten boring except for Expert. Advanced is still too easy with the exception of the tank.
The only complaint I have right now is one type of player. I can stand people who suck, people who get killed and get you killed, accidentally friendly fire, even griefers, but I it gets on my nerves when I hit a server with a really bossy asshole. I don't mean the ones that take command, and are reasonably polite; these ones tell you to do stuff, but encourage you at the same time, are laughing, or clearly having fun.
No, it's the few people who bark orders, take the game too seriously, and yell on voice or write in all caps, even leaving you behind. One asswipe even had the nerve to bitch at me for getting left behind, when he and another person on my time decided to ditch me after being taken down by a witch in a room with 2 intact doors and an ammo dump. The third guy actually helped me back up, and was cool.
Too bad it's so hard to stick to one or two favourite servers. I only play on a single server with TF2, so I've been shielded from this for a while.