Whether laps... or out-and-backs... I think most of us cyclists develop "routes" that we ride. So is this behavior odd? Who knows or cares, but it does seem to be typical for many cyclists.

My earliest routes were very short by my standards today. As I gained experience most of my routes became longer. I can remember how proud and excited I was when I first rode my "original 20 mile route". Which by the way... is just a little short of 20 miles.

My favorite route is 44 miles. But I don't ride that route very often. Most of my rides are between the 20 to 25 mile range now a days. But in bad (mostly winter) weather my rides can become really short.