PA is an open carry state. It's the only legal way to carry until the local sheriff approves you for a license to carry firearms, with the exception of Philly. It's how I've been carrying while I've been (im)patiently waiting for the yellow postcard telling me to come pick up my card.
I've gone around town with my M&P40 on my hip and no one's batted an eye. I've gone jogging in boots and utes (boots and cammo pants) with it on my hip.
I've walked the dogs around town with it on my hip.
I've passed multiple LEOs with it on my hip.
No one's cared. I've had a few compliments. I couldn't care less otherwise. It's actually amazing how many people don't notice that I'm OCing, and how little the ones that notice care. The one LEO who's noticed just smiled and waved hello as I jogged by him. Maybe my area is more relaxed, but I think perhaps people are overly sensitive about being seen carrying. It doesn't make you a freak. It may draw a little extra attention, but it's not always going to be bad, and likely will be good depending on how you act.
It's a constitutional right to bear arms. It's a state law that clearly says OC is legal. It's case law that shows OCing is not cause for arrest, detainment, or harassment from police (Philly is slowly catching on). I'm going to enjoy that right and exorcise it.
On a tactical standpoint... CCing gives you surprise, agreed. However, what about the few split seconds it takes to uncover then draw? Could OCing be a deterrent for potential criminals who generally want an easy target?