Though I didn't hate it, Cadillacs and Dinosaurs is the closest that comes to mind. I don't like 50's(ish)-era stuff, and I don't care much for dinosaurs. But it's highly regarded, so I had to play. Kind of ho-hum for me.
Also, I used to hate hearing about Tom Clancy games, since his name is always on them. But that changed when a co-worker gave me Rainbow Six Vegas to borrow. Incredible game. I also bought Splinter Cell and Ghost Recon for $6 each before that, just to see what the fuss is all about, but I haven't gotten around to playing either one yet.