Played MK II In my younger days. Played UMK3 in the arcades for a little bit when I was younger, but never competitively. MKT for PS1 with my family for a couple months. I started getting much better when It came out for 360, thats when I started learning more about the competition and the pros and the actual big scene.
EDIT- BTW Shock Twisted Metal for PSP is an almost perfect replica of TM2. It is so much fun and the nostalgia just pours in when you play. It's fun.