Easily single-player, primarily because of the story-elements. Actions games and RPGs are also my two favorite genres, and both generally emphasize single-player over multiplayer.
That being said, I do enjoy co-op multiplayer quite a bit. Ninja Gaiden Sigma 2 and Demon's Souls are two of my most played games this generation, and both have strong co-op modes. Competitive multiplayer just isn't my thing....just have a hard time getting into it.







