Adventure Games. Any of them. I don't get it, the puzzles all have completely alien logic and I just can't figure them out. ANY OF THEM. Even the simplest of puzzles baffle me and continue to do so until I look at a walkthrough, see a seemingly simple and (sort of) logical solution that I never would have thought up.
Now, I don't hate adventure games, in theory, it's just up my alley with focus on story and such, but I just cannot play them. Grim Fandango, I think I solved two or maybe three puzzles in that game, and I solved them pretty much by rubbing every object against everything and anything I saw, and for all the rest of the puzzles I had to use a walkthrough. And I tried, believe me I tried as hard as I could, spent hours walking around that town in year 2. Amazingly, the story is so good that I still played the game all the way through.