I guess what really hooked me was when I got a PS1, along with a copy of Spider-man on my 9th birthday. I played the first half of the game over and over and over until I got a memory card. I must have finished that game twice in a row after I was finally able to save my progress.
Before I got my PS1, I had been playing DOS FPSs like Doom, Blood and Redneck Rampage. At the time, I also owned a Sega Genesis with the original Sonic games, but I never did like them. I've never liked a side-scrolling game, which is why I wasn't too upset when my mom gave my Genesis to my younger cousins. By now, it's probably in a Quebec landfill. Oh well.