I never had a PS2 so there's a whole back catalogue of exclusives i'd be interested in.
For example the God of War series since i'm a fan of the hacknslash action/adventure games and am looking forward to GoW3.
Also i have DMC3 on the PC but the controls are rather iffy and not *quite* as responsive so i'd buy it again on the PS2 if i had the opportunity to play it.
Other than that i don't feel there are any *must* have exclusives for the PS3 and any *must have* multiplatform games i tend to buy for the PC or 360 (depending on genre) because i prefer the 360 controller over the PS3 one.
Anyhow, went out today and bought my first game for the console

, Heavenly Sword. Played the demo and it seemed rather good so i think i'll get to try it out during the week =].