I'm not so surprised to see NGE mentioned in this thread; I'm a bit overwhelmed, however, with the number of mentions. Personally I think it is over-rated but still a solid anime with tons of quotable moments. And the 2nd movie in the rebuild series is the best thing I've ever seen.
I'm absolutely shocked, however, to see Azumanga Daioh, K-On! and Chobitsu garner more than one mention in this thread, each. Especially Chobitsu. It's not my favourite of the three, but it's the one anime I thought I'd never see anyone hate. Oh well, life's too short to be befuddled over other people's preferences...
Can't say I've watched at length any thing too painful, but...
Lucky Star isn't very good.
Trigun wasn't very good.
Jyu-oh-sei wasn't very good.
The only anime I ever decided not to watch after watching one episode was Shana no Shokugan (sp?).
School days was painful, I just skimmed over it at 30s intervals looking for the oft-mentioned ecchi moments... none to be found
