When I play alone, I usually run tournaments in my head - sometimes I write down the players' names to keep track of a larger tournament.
Sometimes I'm not even the one playing in the tournament, it's two other people and I provide color commentary in my head on the action. My favorite scenario is a local arcade is running a smaller tourny and the winner gets entry to the large tournament with no buy in fee.
Over the course of a few games, each player begins to develop their own personality and gameplay strategy and some rivalries are born.
Last night while playing a 2 player game of No Fear, my wife asked me which player I was. I told her I'm not even playing, it's two other guys trying to qualify. She rolled her eyes at me.
Anyone else do this too? Or am I just a bit touched in the head?