The original PlayStation. But I didn't get it until I was 18, in 1997. I was poor when it released, so I only got to play it at friends or family's homes, or when my brother-in-law would rent one. When I got my first job at 18, I bought my own PlayStation with my very first paycheck. No regrets. XD
I remember staying up all night playing the original GTA, and then shortly after Silent Hill, Castlevania: Symphony of the Night, and Final Fantasy VII released. I was in heaven. Some of my fondest gaming memories since the NES days.