I was originally going to stick this in Confessions, but I figured it was a broad enough category to deserve its own topic. Anyway, one of the (strange?) things I do...
When I'm driving down the highway, I'll usually end up grouped with 4-6 other cars in the right lane who are going at about the same speed. Occasionally, a car from behind will fly past all of us, or one of the drivers will leave the group to pass those in front of him. Well, as all this happens, I begin to create stories for each car and a general plot that includes all of us. Example: Black Car decided to stop following Red Car because she was sick of his abusive and destructive lifestyle, and wanted to have a life of her own. I'm on this particular highway for about 25 miles, so the stories eventually delve much deeper.
So, I've always wondered if I'm the only one who does that, or if other folks do something similar.
Also, post any other "Am I the only one who does X?" you may have, because it's interesting to see the strange (or not-so-strange) habits we've developed and how much we overlap.