Oh, so you're THAT guy in front of me, slowing me down!!!

I did a metric century (100km/60mi) last year in 4hrs on a 29er with narrowish (700x32) tires in a hair under 4hrs so you can do decent time on a more upright bike (flat bars vs drop handlebars). I pass people who are riding racing-style bikes and get passed by people riding uprights, I don't care, I'm having fun and am getting to where I'm going in decent time.

I do have a bit of a competitive streak in me; if a person appears to be just slightly slower or faster than me and is ahead of me, I will try to catch up and maybe over take them.