The Slam Dunk manga is really nice, but the animation was just terrible, which is such a waste. Samurai 7 isn't really that bad. I actually watched the movie before watching the anime, and true, lots of stuff were changed. But I guess all adaptations leave some room for imagination and creativity (if not, what's the point of doing an adaptation at all?) and it's not that bad really.

Hmm worst anime ever... *thinks*
Well I never made it through Noir. The opening few episodes were pretty good but it got slow and boring and I fell asleep halfway. It didn't help that the subtitles were horrible and off-timed. But I don't think it deserves the title of worst anime ever.... probably Dragonball is the worst anime ever imho. I was forced to watch a few episodes of it last summer and it was pure pure pure torture.