LOL good one
Burnout 2 is excellent when playing multiplayer, not a realistic game though but fun as hell, even you hate racing games (like me)
Tony Hawks Pro Skater 4 - all console owners must have this one, MP isn't the greatest but it's the best singleplayer game for the PS2 ever

Fifa 2003 - fun, if you like soccer
Ratchet & Clank - supposedly a great singleplayer game, haven't played it myself
Sly Cooper - as above.
Haven't really bothered playing Shinobi yet but maybe I should give a try one of these days, only heard great things about it.