Hearing people say they liked Fallout 3 and New Vegas, but not 1 and 2 is a lot like me saying "Man, I loved Final Fantasy 13, but I just couldn't get into Final Fantasy Tactics!"
That's not true. I never even tried 13 after watching my brother play it, and I loved Tactics. Point is, FO:3/NV and FO:1/2 are separate genres of game in the same setting. I can understand why you wouldn't like it.
Problem with this thread (for me, at least): I like everything I should (so far). Am I broken? Guess I'm debating the semantics of the thread title. If I know why I don't like something, I shouldn't logically like it, right?
Oh, here's a good one: Halflife 2. The first one felt much slower-paced, more about puzzle-solving. Halflife 2 be all like "HEY, FOLLOW ME! PICK UP THAT CAN! GET IN THIS GO-CART! F*CK! GET IN THAT BOAT INSTEAD! THERE BE ANTLIONS, SHOOT THAT GOO AT THAT GUY! GET ON THAT TRAIN! YOUR GRAVITY GUN IS A SHOCK RIFLE! YOU'RE A TIMELORD!" I finished it, and it was like snapping out of a trance. I am not sure if that's a compliment or not.