^I disagree. I like Part 2... I mean it's not as good as the first movie, but it's by no means bad. At least, I didn't think so. It's the same stellar cast, with some really cool future stuff. I'll admit that going back to the 50s was a bit of a cop-out, but I still enjoyed those scenes.
It doesn't have that feel-good nature that part 1 does, though. Every time I feel bad about myself, I say "at least I'm not old George McFly!" Pretty effective actually.
Still miss the ride. My one true BTTF childhood soft spot...