God, it makes me feel old to see people writing about PS1 games being their first... I was 15 when I went out on Boxing Day with money I'd got for Christmas and trawled every shop in town for what seemed like the only Playstation left.
Um, yeah. So, the first game I ever played, while I can't remember what it was, it would've most likely been on the Spectrum back in the mid-to-late 80s. We had an old Radio Shack computer before that, on which my dad would load up some kind of dancing alien looking thing (though, to be fair, it could've been anything with those Atari kinda graphics) but I wouldn't really regard that as a game.