Right now I have 11 or so games for the GBA micro. Over my lifetime, I have had different systems, and games, I have had a NES, SNES, N64, PSX, PS2, PSP, DS(getting a lite soon), and a XBOX. Unfortunately I have never owned a SEGA system. Games I have bought in my lifetime.. I would estimate I have had 300-400. I have traded them in for newer systems or games over time.
My favorite was when I got so bored with the N64 and traded it in with 4 controllers and a bunch of games for a PSX , RE2 and FF7. The PSX was a far superior system compared to the N64 in terms of games.