I believe I may have to confirm, but it's hard to say what my favorite PS3 game is. I have a small list of favorites, but I can't really decide on a single favorite. Most of them has "S" in the title though. Stuff like:
Dark Souls Darksiders Castlevania: Lords of Shadow Eternal Sonata inFamous (the entire series in general) Bioshock
But then I also have some like Ni No Kuni and Dragon Fantasy that I find very enjoyable too...so...
If you're not going to share with the entire class, then don't bother sharing at all. Online is the worst thing to happen to gaming.