I tend to lean more towards single player games. I find that I don't get enough time to play so when I do, multiplayer games can be frustrating as a lot of the time I'm not at the same skill level as my opponents due to lack of practice. Particularly FPS games, I tend to suck at due to the aforementioned reason.
On the other hand I don't mind multiplayer racing games as I feel like I'm on a little bit more of a level playing field.