Hey bros, I'm about to venture into the world of PS3 gaming. Having gone through so many years now, what are your top recommendations of games (then and now) that I should get?

I'm interested in games like:

RPGS : Final Fantasy
Espionage : Metal Gear Solid
Story-driven : Heavy Rain
Music games - this one will either be rock band or guitar hero I guess?
Party games for when friends come over
Action : God of War

Etc etc. Hope you can help me get started with your PS3 Must Haves here!