open carry, stances, general public....
For armed citizens or anyone who works in a armed, uniformed position, you should learn to stand with your firearm protected or off-line from a person next to you. You don't have to be aggressive just use common sense.
Some people or young kids may see your holstered firearm & be curious.
Avoid allowing anyone staying close to the weapon or distracting you.
To learn a few weapon retention skills or to be able to fend off a firearm snatch is smart too. Some street people or criminals may appear "docile" or friendly but could be aggressive in a instant.
My state recently put new gun laws in place to avoid CC license holders(W) from any legal hassles if the concealed firearm is exposed.