SWTOR: Not because I hate it or anything. I thought the story was fantastic, but it definitely isn't worthy of being called an MMO
Pokemon Diamond/Pearl: It was not paced well at all. It made it extremely grindy, coupled with lackluster pokemon, I just found it very bad. Compared to all of the other Pokemon games... objectively it was pretty good.
Cataclysm: It just wasn't well thought out. They focused too much on the leveling experience that the endgame fell short. Plus, I hated Firelands and Dragon Soul's themes. I just didn't really enjoy Cataclysm.. which would explain why I was subbed for around 6 months total during Cata.