I actually started with a ps2. Though I made my way to older consoles thanks to my dad, he's shown me a lot of old arcade games and bought me a gameboy advanced soon after the ps2.
The first thing I ever played games on was a Commodore 64. Never owned an Atari (my cousin had one, so I got to play it quite a bit). First console that was my own was the good ol' NES. Still have it!
My first games were on Atari, but I did own a Commodore 64 soon after. I think the first game I ever played must have been in the arcade though... Pac-man maybe? Or Asteroids.