X-men vs. Street Fighter
While I was in College, I would sometimes spend all day at school with long breaks between classes. I didn't like studying at the College (a task done solely at a Tim Hortons near my house) so I would spend breaks playing the Street Fighter vs X-men stand-up arcade machine. I had previously avoided fighter games outside of my console-owned ones, but with no one around to challenge me, I got to play through the game uninterrupted. Eventually, someone would come by here and there and go against me, and surprisingly I'd do pretty well. I never learned any infinite combos, but opted to play odd characters that people didn't know how to fight against. My main team consisted of Black Armored Juggernaut and Blue Dhalsim, an odd couple to be sure. This allowed me to play mind games which works great until you go against someone who's genuinely good at the game. Still, I got pretty decent at SF vs Xmen and continued playing it into University between classes.