mine is FF13-2 the common complaint is its story, but imo its the strongest part of the game, its just if you're stupid it'd be hard to follow and I guess I'm just a huge fan of time travel/multiverse theory and plus the game explains all of the big words.
and DmC, just cause best game in the franchise imo and I've been a fan.since DmC3.
Sonic Unleashed. I didn't love the game, but I didn't get the hate for the Wearhog and I really enjoyed the daytime levels. The hub world was terrible though, I'll admit that.
Gears of War Judgment. The game definitely had problems (not enough content, for one), but the community really hated all of the changes and I loved them. I found the changes to the controls and free vertical movement to be refreshing, and Overrun is tons of fun.
Halo Reach. Undoubtedly my favourite Halo game (although I'm not a big fan of the series, so that may explain why I loved it and others hated it).