It was either '88 or '89 (I was only 4-5 at the time, so I can't be sure) when my parents bought my sister an NES with SMB/Duck Hunt. It didn't hold her interest for long, but for me it was a different story. Less than a year later I beat my first video game - CV2, with the help of a cousin who told me where to go.
My dad was trying to get me into baseball at the time, so it's quite possible that if it weren't for video games I would have grown up to be a dumbass high school jock. Given my proclivity for all things fitness nowadays, I'm almost certain that would have been the case.