my first system was a PSone but it got colored on by my infant brother and since my mom was a tweaky twakker. she sold it for drug money, yes i know its a sad story but its true
My first game system, sad as it is, was the Nintendo Gameboy SP. It provided me with hours of fun and, like any game system in my opinion, sucked money out of my pocket pretty quick. I wouldn't trade it back though.
Well, the first one i ever played was a SNES but the first one that was bought while i was born was the Nintendo 64. both are great and are still classics.