Well, I want to love every game I buy; why wouldn't I? We'll limit this list to games I feel like I should love, based on my own tastes and the recomendations of others, but don't.
Final Fantasy VII -- you know, Squall may be kind of a mopy jerk, but at least he has a personality. Cloud is just such a gaping void, it's hard for me to care what happens to him. Sephiroth isn't much either (but ... but he's so pretty!), which wouldn't bother me, since bland villains are a grand Final Fantasy tradition, except that people keep pretending he isn't. I dislike the materia system; I don't really like anything about this game (OK, there are a few cutscenes that really impressed me, at least at the time). I wouldn't say I hate it, and I think I liked it as a kid, but my plan to (re)-play the entire series in chronological order hit a brick wall with this game, and I just couldn't muster the will to continue. What a lot of other people consider a great high-point of the series, I view as one of the lows. It's too bad.
Baldur's Gate -- I mean, I can certainly see how this game must have been a revelation compared to the D&D games that came before it. I found it frustrating and dull, though, and I thought the way the party is handled wasn't great; lots of characters, but they weren't well-balanced, or terribly interesting. I did enjoy the degree of exploration, just wandering off the screen in a new direction, opening up a new map, seeing what's up.
A special mention goes to the alignment system; I played a good party, but I wanted to use Viconia because I needed a cleric, so I'd play as a good character, but periodically murder a random stranger to keep her happy.
I do plan to try the sequel, which I hear is a great improvement; just one of those things I mean to do but never get around to.
Ocarina of Time - Kind of boring, kind of empty. Yes, it's 3D, but I don't get it.