I'm going over my list now
1) SMT:N - one of the best games I've ever played, think pokemon style gampley with a mature story, fuck awesome art direction, great soundtrack and you have the best RPG on PS2
2)MGS3 - after being a little disappointed with MGS2 I didn't have the highest expectations for this one, but oh boy did this game blew me away. CQC rocked, the story was beautiful and the ending a stuff of legends.
3)Gradius V - granted I bought it a couple of weeks ago, but fuck it this game rocks so fucking much, amazing visuals to complement an almost perfect gameplay. the game is very challenging but so much fun. I feel fucking invisible when I have 4 multiples plus laser plus missles plus force fields plus speedx3 and blasting my way through levels
4)DMC3 - the king of actions games, not only can you kick an insane amount of ass in the game but you can look good while doing it, pulling off insane combos is such a gratifying experience that only DMC3 can deliver.
5)ZOE2 - I love love love this game, beautiful visual awesome soundtrack and controlling Jehuty is just a bliss I love the boss battles in this game so much, Konami did not only improve on every aspect of first ZOE they created one of the best action games ever.