Hmmm, let's see....the ones I'd say for sure:
Fringe
Dollhouse
Angel
Buffy
Stargate (several)
X-Files
Sopranos
Shameless (for teh boobies, plus William H. Macy as a drunk is a stitch)
Californication (for teh boobies, and Duchovny does a *great* self destructive dickhead)
Six Feet Under
Band of Brothers (short, but sooo good)
EDIT:
Being Human (US version (haven't seen the UK one) is pretty good for a TardFy show)
Castle
EDIT: (gah, keep thinking of good shows)
Spartacus
Rome
Maybes:
Lost (series overall was kind of meh towards the end, but at least at that point we were seeing lots of Mark Pellegrino who did a great job as Jacob)
Supernatural
EDIT:
Shows I wanted to like, but couldn't get into:
Boardwalk Empire
The Cape(just terrible)
Terriers (I think I hit it too late)