I prefer 2e and earlier, with B/X being my favorite, but I wouldn't say that I hate the WotC editions. There are a lot of design decisions that I dislike, but I do like the following:
3e/3.5e: I really like Ascending AC and armor restricting Dex. I like the new saving throw categories (although I think the saving throw "math" got messed up). I'll give an honorable mention to the honest attempt at fixing multiclassing, even though the new multiclass rules didn't really work as well as I'd hoped. -- oh, and of course, the OGL was the absolute best thing to come out of 3e.
4e: The idea of "flipping" saves to defenses is interesting, but I wasn't quite sold on it. The redesign of the planes is nice, although I don't like some of the new names. The idea of needing to meet specific requirements to kill a god, just like needing to meet specific requirements to destroy an artifact, is really cool.