If you like artsy games you should check out the games by Santa Monica Studios: Flower, Journey, Unfinished Swan. Also maybe Sound Shapes. Those are all PSN games. I mention them because most of the other games are covered above.
If you're into JRPG's you could get Tales of Graces F and Ni No Kuni (Kuni is a bit cliched but is fun anyway and very beautiful). I'd definitely reiterate some of the above that you should get the Uncharted series. The first game will be a bit clunky but it's worth a playthrough anyway. 2 and 3 will really be an experience, those two are definitely AAA - most agree that number 2 is the best.
edit:
If you can find this at a decent price it would be a great purchase. 3 PSN games in one compilation. Flow IMO is a bit lame. The other two are great (again - if you're into trying some artsy games without conflict).
http://www.amazon.com/Journey-Collectors-Edition-Playstation-3/dp/B008CP6RWU/ref=pd_sim_vg_5