A game you "didn't know it was bad 'til people told you so"?
I'm talking about games that you still like but you had no idea were criticized so much.
The perfect example for me is Sonic Unleashed.
I admit that the game has its bad things, but I would have never imagined that it was so hated at the time... Although, that could be extended to the entire Sonic franchise, since for many years I was not aware at all of that "Sonic was never good", "Sonic had a rough transition to 3D" nonsense.
I spent a lot of time playing Banjo Kazooie: Nuts and Bolts alone and online with friends. A lot of people I've talked to view it negatively and are surprised when I say it was one of my favorite 360 titles. It's one of the main reasons I want to try out Xbox 360 emulation.