I carry for the same reason that most everyone who carries does. To protect myself and those I care about from a dangerous attack that could result in serious bodily harm or worse. I carry just about every place I go. There are not too many places in my state where the law excludes me from carrying a firearm. Banks, police stations, our legislators' offices, restaurants, including those which serve alcohol, and a host of other places.
Most of the time I open carry because of a few medical conditions I have (osteoarthritis and lumbar spinal stenosis). I'd rather someone who is of a mind to do me harm sees my little friend first, then seeks out another victim for his pleasure. I do conceal when I deem it to be in my better interests at some specific time and/or location but when I conceal, I look just like any other potential victim who can't seem to move too fast.
Carrying a firearm is my right, guaranteed under my state's constitution. I take this very seriously and have no qualms with going about armed. And in Virginia, that is a no-brainer.