Before I even touched RPGs, I was a huge fighting game fan, and at one point in my life (before picking up Final Fantasy VII), fighting games would be all I would ever play.

I voted for Mortal Kombat, because it just so happens that that was the very first fighting game I ever played. When that game first came out, my mom grounded me for sneaking that game into her house when I had friends over, because she didn't like the blood and the fatalities.