I'm gonna have to disagree with you guys on this one - NGPC is an awesome console in my opinion! Rattamahatta, you should see if you can get the opportunity to play one before you decide.
Must have list:
Sonic Pocket Adventure
Puzzle Bobble
KOF r-2
Metal Slug: 1st Mission
Metal Slug: 2nd Mission
Also it has the best D-pad of any hand held (it's like the neo-CD one), runs forever on 2 AA batteries, and it's hard to find but there is a link cable that allows you to connect to the Dreamcast and share data in KOF and Cool Cool Toon, possibly others!