I was a very very casual gamer as a small kid.
I had a NES, SNES, N64 and PS1 but played those very very casually. Had maybe 3-5 games for each of those consoles. Gaming was a side thing to do, not really a hobby cause I'd probably be more interested in playing with my power ranger or DBZ action figures than play video games if given the choice most of the time.
When the Dreamcast came out is when I made a permanent shift into an avid gamer. I'd guess it was a mix of the catalogue really grabbing me as well as being a bit older in my preteens and actually understanding stuff like plot and shyt in the video games. Dreamcast is also responsible for my love of fighting games, I'd be in an arcade every now and then but the capcom catalogue of fighting games on dreamcast is where I really got hooked and did most of my competitive play.