Best for me was GOW 2. Worst is harder to call. I'll say the punisher game was a huge disappointment after they censored the violence.
Actually liked Metal Slug 3D. If you just pretend that its not got the Metal Slug name on it and don't hold it to that brands reputation... it actually is a fun romp. Seeing the POWs in 3D was interesting to say the least.
I spent most of the sixth console generation with Gamecube, and only got a PS2 near the bitter end, so there are many games I never got around to playing. Despite that, here is my list: BEST: -Metal Gear Solid 3 (obviously) -Resident Evil Outbreak File 1 and 2 -Silent Hill 2 and 4 -Siren -Tony Hawk's Pro Skater 3,4,Underground, and Underground 2 -True Crime: New York City (my favorite glitchy-ass game!) WORST: -Legaia 2 (not terrible, but a major disappointment after one of the greatest RPGs of all time) -Obscure: The Aftermath -RPG Maker 3