I enjoyed all three a lot. And I often think of the so-called Butterfly Effect that this movie is completely premise on (i.e. 1 small action absolutely causes a divergence in timeline) when watching other time-travel movies (Don't get me started on Terminator 2). You just have to keep in mind that this altering effect is not instantaneous; the effect has to catch up with time. Hence the reason why Marty starts to fade in Pt1 and Old Biff is dying while Doc and Marty don't really notice the altered reality in 2015 of Pt 2.

Back to the Future is an utter classic for its genre, and the sequels are good, but not great. I just think it is so hard for any sequel to duplicate the magic of the original, cause it isn't original anymore. The Empire Strikes Back is the only sequel that is as good as its original, because that movie is so different then Star Wars.

For me, I will watch BTTF II & III when they are on TV, but I only watch the original on DVD. And yes I wish I could get a single case for just the original BTTF, cause I am that anal when it comes to my DVD collection.

Why anyone would prefer to watch something on TV over DVD I'll never know. Give me a DVD or internet download over TV anytime!

Oh, and in my opinion all are good. But BTTF2 > BTTF1 > BTTF3