I have two handheld systems-
The NGPC, and the original Gameboy (pocket version.) I don't count the Turbo Express as it's big and eats batteries like crazy.
The NGPC is great, but the library is small. That leave the GB.
I still find great games for it, and the battery life is awesome. I know that if I buy a GBC or GBA I'll go crazy buying games for it.
Yes, I'm stuck in the early 90's.
Anyone else?