Little Big Planet or Grand Theft Auto IV???

Little Big Planet or Grand Theft Auto IV???, originally uploaded by Rob Boudon.

I need your help again guys. The last time I asked which game I should play first, you overwhelmingly decided that Legend of Zelda Twilight Princess would best Final Fantasy XII. This choice I believe is even harder. When I start games I usually play through them till I beat them. I'm going to begin either Little Big Planet or Grand Theft Auto IV. I'm not sure which one to start first. What do you suggest?