Killer is Dead. While not bad as in, it is decent, it pales in comparison to other Suda51's works. But I loved it anyway!

Dead or Alive Xtreme 2. I'm sad that my disc doesn't work, but tried this game once and loved it. I could be oogling those virtual boobs with the camera forever.

Killzone. The graphics were amazing, but the weapons were boring and the story was just WWII in space.

Sonic 06, duh. :P

I knew LBP was bad, but I tried to like it anyway since I had bought it alredy.
At the end I gave up and sold the game 6 months after lauch (unsurprisingly it was worth nothing by then).

Have some great memories playing an old rampage arcade game at a local pizzeria when I was a kid.  Manager would put it on free play Sundays so me and a couple of friends would put in 100+ levels while the family ate.  Had more fun fighting each other than destroying buildings.

An old favorite of mine was double dragon vs battletoads.  Game was hot garbage but I played it so much that I could beat the game with one life.

I read the title wrong.....I read it as, games you were bad at so with that said ill have to think about it

None realy.. I don't like bad games.

Isn't there any instance on which you'd like a game but everyone else considers it bad? It is not what OP asks, but it would be an interesting response nonetheless!

Pretty much every MMORPG I've ever played... 

Other than that, Mystical Ninja Starring Goemon is the only one that comes to mind. Technically, it's a pretty bad game (framerate issues, horrible camera, a lot of glitches because of bad programming). But I still love it to death and it's one of my favorite games of all time. 

EDIT: Oh yea, and also Sonic Riders. Loved that game, but I can't remember why :/

Test Drive Unlimited 2. It's my second longest played game (after GTA V). I loved it so much!