I'm always fidgeting with something. I hate sitting still so I always start playing with whatever junk is lying around, much to the annoyance of those around me.
I can not bear to walk by a mirror when it's dark. When I was a kid I'd count the steps between the light switch and my bed so I could get to it with my eyes closed. It's easier now as I have a lamp right next to me but I still avoid it wherever I can
Lights on a dimmer always bother me unless they’re 100% on or off. I swear I can hear a buzz or see a flicker. No issues with actually dim lights (candles, dusk, etc.), just dimmer switches