From years of working in that high school cafeteria, I have a habit of counting everything, even now when I don't need to. Count how many time I scoop something, cut something (really annoying when I am cutting out something to sew), sweeping, anything repetetive. It is such a habit that it annoys ME!

The most annoying thing I do that annoys others is I can't stand to see food uncovered. This drives the guys I work with nuts that I am always running behind them recovering the food, if they leave the table for more than a minute with their plate still there with food on it, I open a napkin and cover their plate. I don't think it is strange, just careful.