Fallout 3: I never really got into the game. I didn't find it to be Oblivion with guns, as I didn't really like Oblivion either. Both of them, in my opinion, had bad stories, and overall weren't good.
Half Life Series: The first one may have added in stories to FPS's, but I found it to be a average shooter, with puzzles and a gravity gun as it's main selling point.
WoW: After playing WoW for a while, and enjoying raiding with friends, the expansions ruined it for me. It was just grinding 10 levels, then raiding. Raiding became pointless as you get better gear much easier in the next expansion.
Physchonauts: After playing, I hated it. The story was pretty good, but the game was an overall "meh" in my opinion.