Well, if I did have to walk in downtown Memphis at 2 am wearing a tux with $100 bills sticking out. I for one, would want to be armed and prefer it to be visible. A concealed weapon is nice but you would probably look like a big target.
I see pro's and con's to both.
I see the need to open carry when you are put in a situation where YOU might be the victim ie. east Nashville, Memphis, any ghetto (some of us don't have the luxury to just avoid dangerous places)
I see the need to conceal when in Brentwood or Bellemead, where "IF" something did happen you can best decide "if and when" to use it.
OC, CC it's all about the best tactical situation, in which, your environment is a key factor