I had a Sega master system / Megadrive, they werent really 'mine' as such though.
My First one was the 'SNES' Super Nintendo Entertainment System'
It came in a limited edition 'Street Fighter 2' box, with street fighter as well. Amassed about 20 games still got the majority of them (some boxed and with manuals) got 5 or 6 controllers (had to fix some of them - remember screwing them off and looking inside - the plastic had worn of undernearth of the buttons me and my brothers played it so hard.)
actually have 2 of the systems themselves. I still stand by, for gameplay / enjoyment the original Super Mariokart (on the SNES) was one of the best games ever. played on it a year or 2 ago, and its so fun, could 4 player, great for parties etc...
hard to beat, different levels modes etc. Amazing - especially for its time.
I guarantee that I am younger than you all, but my first game system is older than a majority.
I started old school. Atari 2600. Then Nintendo (loved duck hunt), and SNES, N64, right up to Gamecube. Went computer game around N64 (~94 or 95. Granddads 5th birthday present to me. Still have it, and it still works hard as a server now)