There's been plenty of games I've played that received horrible reviews and were extremely hated on. The first one that comes to mind is Superman 64. I am NOT joking. I was a kid back then, probably around 12. I remember renting it twice and I thought it was pretty damn cool! Maybe if I play it now I can see how horrible it is, but I sure had fun with it back then.
Another one that comes to my mind is Two Worlds. This game was supposed to be the "Oblivion killer". After the highly acclaimed Bethesda game, people were ready for an even better experience, and Two Worlds was supposed to be that game. People ended up hating it, and quickly titled it "the worst game ever made". In my opinion, this game is a much better RPG than Oblivion. It's more of a hardcore experience, and once patched, the technical issues weren't that bad. I loved the game, and the sequel was a massive improvement. I am still eager for the 3rd one.
So what are some of the games that you're afraid of telling people you like?