PS3 Recommendations?

[CinderEmma]

I just got a PS3 about a month ago, and just got it back from my sister after lending it to her for 2 weeks (I came over to play a few times though XD). I got Burnout Paradise, Limbo, LittleBIGPlanet, and You Don't Know Jack so far. Well, technically I bought the PS3 and LittleBIGPlanet and my sister bought the other games :P Anyway, I'm not sure what to buy next, I'm still happy with the games I got for the moment but suggestions would be great! And give a brief description and why you like it please :D And if you want my opinion about the games I got, ask and I'll tell :P

[GigaRevival]

Uncharted Series.

http://en.wikipedia.org/wiki/Uncharted (I'm REALLY bad with "brief descriptions")

^^There are spoilers about the game though... so read with caution.

[CinderEmma]

Looks like something my sister and I might enjoy, thanks Giga :) (And no, I looked the titles up with Gamespot, I'm not risking spoilers :P)

[singing_Noel]

The Resistance and Killzone series, and also Heavy Rain. The best games you can get on the PS3 in my opinion, and the main reason I got one.