I wear a shoulder rig hunting as I sit a lot and have other stuff on my belt. If I wore a jacket more I'd probably wear it more often.
I've always thought that some people take the 1st rule a little to far with regards to holsters. After all, if you ever go upstairs with a belt holster you're pointing at everyone below you. If you keep one in a glovebox you're sweeping everyone you pass on the street.
si vis pacem para bellum