Nokie N-Gage is dead. And I actually owned one of them. Lol Taco phone =_=.
Anyways. I've had 2 Original fat DS (Silver and Blue)
And I got like 3 PSP Right now (Broken that was given to me to fix, Borrowing 1, and about to buy one
, So it's considered 3 lol)
And I got to say. If you still have that child mentality and casual fun. I would go for the DS. Animal Crossing lasted me months, The hype for Mario Kart DS delivered, Alot of RPG games, etc. Huge library of DS games to choose from.
But if you have a PS3 and want to use full advantage of PS3 contents, go for the PSP. It's amazing because you can transfer PS1 games, Transfer pictures, music, etc. Amazing games i.e Monster Hunter Freedom Unite, Dissidia, etc.
Really up to you.
If you've never owned a PSP, Don't like going to Gamestop, Don't want to carry UMD. Get a PSP GO. But if you have a whole library of UMD games, PSP 3000 is a sure win.