Usually games where you can do things creatively and the simple elements are fun.

I went through Enter The Matrix in bits and pieces a lot, same with Spider-Man. FFVIII is usually the only FF I'll play without aiming to finish because messing about in the menu is fun. Though I played FFVII a LOT.

The GTA games and Spider-Man 2 I played a lot after getting to the final missions, but that's not really replaying. Still playing Spider-Man 2, man that game has a lot to do...