I hate the DS. I think they could have done a lot better graphic-wise. The only reason is that I'm keeping it is because of Scribblenaughts. Opposite of Crunchie, I think that the DS was born for FPSs on the go. I loved Medal of Honor for the PSP, but aiming was so hard on it. With the DS, you can pretty much have PC controls which make the gameplay a lot better. I personally liked the C.O.R.E. game, I had a ton of fun with it.
EDIT: Edited.