I voted 'other' and I did that because I think that in single player games winning although satisfying is never the reason I play, unless it is some kind of puzzle/challenge game like god of war or portal in which case you are kind of versing the computer head on. But the games I usually play eg. The Sims, TES, Minecraft, Mount and Blade. Are all games with no clear victory conditions except for those you make yourselves (except for TES but in those games I rarely get passed the second mission in the main questline before my 3rd or 4th character). I like that aspect of a game, however in multiplayer games like CS:S that I play I always play to win, quite simply because to me winning is what makes it fun haha. I don't know about you but I think winning a game in and of itself can be enjoying regardless of how you do it. But that doesn't make it the only reason to play a game.