Fun story: When I was little, around 4 or 5, I was obsessed with stoplights. I made up a bunch of songs about them ("yellow light, between red and green!"). After that I cooled off on stoplights for a few years.
In Global Studies class last year I had a seat facing a window, so I was usually looking out of it during class. In January I noticed that in the distance, between a few trees, you could see a little stoplight from the classroom. It for some reason captivated me, as if I was a (younger) child again. I pointed this out to my friends, and my teacher. It became a sort of inside joke. I actually created an album and used a stoplight on the cover. The longest song on it is called "Stoplight"
(Shameless plug:
https://www.youtube.com/playlist?list=PL25EOfxEqrvJcqaSW4OERRbnyl09czViQ.) So yeah, within my group of friends I'm the Stoplight Guy.