PS3 is my least-played system, easily. Haven't beaten a single game on this list. I still use it to play PS2 games more than anything else.
Disc-
-Resistance (it's okay but I'll take Halo n' CoD over it)
-Ridge Racer 7 (RR6 Champion Edition)
-Untold Legends Dark Kingdom (meh)
-Shin Sangoku Musou 5 (Destroyed by the superior Musou Orochi games)
-Heavenly Sword (Overhyped, but okay. One day I'll play through it)
-Motorstorm (need to sell this; new version coming out in Japan soon with all the DLC included)
-Uncharted (need to play this, looks good)
-Unreal Tournament III (not bad)
-Devil May Cry 4 (need to play this!)
-Ninja Gaiden Sigma (REALLY need to play this!)
PSN-
-Tekken 5 Dark Resurrection Online (Good, but I'd rather play VF5 online and TK6 is in arcades)
-Super Stardust HD (eh.)
-Warhawk (fun, needs improvements, but decent enough)
-Loco Roco Cocowhatever (I felt ripped off by this)
Blu-Ray-
-Pirates Of The Caribbean The Curse Of The Black Pearl
-Pirates Of The Caribbean Dead Man's Chest
-Casino Royale
-Ocean's 13
-Die Hard
Shit I sold-
-Virtua Fighter 5 (for the 360 version; might buy it back for the hell of it)
-Minna No Golf 5 (might buy this back too. I prefer Capcom's We Love Golf on Wii over this)
-Sega Golf Club (YUCK.)
-Wangan Midnight (eh.)
-Powersmash 3 (sold because of the 360 version's online, although I never did buy that version)
-Gundam Musou (just wasn't feeling it)
-Genji 2 (looks so good and plays so bad)