For me, I CC because I want the element of surprise, and, as noted above, I don't want my weapon to become a target. Here in MS open carry is legal, but a holster is considered concealed, so you have to have a permit to open carry, practically speaking. A few weeks ago I was driving home with my family when we stopped to help a motorist beside the road. When i got out of my vehicle I swept my shirt back behind my gun just so the guy would know I'm armed. But I do not make a regular practice of OC.
If somebody wants to, mad props. If somebody doesn't want to OC, mad props. If its legal and you want to do it, go for it.