Sherbertine is my PSN, but I only have Little Big Planet, Marvel vs Capcom 2, and Wipeout HD as my multiplayer games. XD Not a big PS3 user, but I hop on every once in a while for some LBP, it's practically the only reason I got the system. And I'll definitely be on there more for LBP2.
I only have Valkyrie Chronicles and FFXIII as my single player games, lol. I've been meaning to get both the Uncharted games, just waiting for a sale, and Heavenly Sword as well. Any other good games worth checking out that are PS3 only/better on PS3 than 360? If it's available on the PC I will always choose PC however, I just love the power of PC gaming!