Psp vs. nintendo ds/dsi

Which one should I get? I'm 26. Which one is better suited for 'adult' games? Also, what is so great about the new Nintendo DSI? What is the difference between a DS, a DS lite and a DSI? I'm so confused...

Ok, a DSI has a camera in it so you can take a picture of yourself. A DS Lite is thinner than a normal DS. I have a PSP but I only use it when I'm on vacation. It has a lot of M games for it. I've never seen a bad game for DS's. All I've seen is Mario and animal games.

Thanks, usarugby. I think I get the difference between the DS , the DS lite and the DSI now. The DSI is the newest but the DS lite is just a newer, better form of the DS. The DS doesn't have any capabilities that the DS lite doesn't have, right?

Let me clear this up. I don't mean 'adult' games as in 'bad' or rated M. I mean like games adults would like, not little kid learning games and stuff.

Play station is pretty good I used to have one but prefer the Xbox set but the PSP would be better.

well the psp has internet and you can play with people around the world and it looks better too. you cant get movies on the ds. I just got pinapple express and step brothers for my psp

wow your 26 sorry but you need to get a job and get focused on life
its pathetic I have both the dsi and psp and they both suck I just play my ps3 all day