I recommend Okami. I'm not good at writing reviews, but I can try.
If you want my opinion, I thought Okami pretty childish

If you are looking for Epic and bloody games go for:
- God of War I+II
-Prince of Persia: warrior within.

Stealth games:

PS2:
-Prince of persia: the 2 thrones.
-Shinobido way of ninja
-Tenchu games

PS3:
-Assassin's Creed it's freakin awesome

RPG games:
-Rouge Galaxy...it's more like FFXII but the awesome version!
-FFXII...I really liked this game after the 5th time.
-Dot hack series...You have to get that game.
-FFX one of the greatest FF games ever made.

Racing:
-Need for Speed series

Fighting:
-Teken 5
-Virtual fighters 4
-Naruto

That's what I can remember for now...