Open carry is legal here in PA, but I went for the CC license to be on the safe side of the law, which is downright baffling at the thought process. But I digress...
I generally carry concealed, but with an increasingly-loose attitude towards it. I used to worry a lot about people being able to see that I had a gun on me, making sure that it was well concealed and would take some time here and there (in private) to ensure that it was still hidden.
Nowadays, I am much less concerned with it. Rather than be sure its tucked under a shirt, worrying about hiding the clips from my IWB holster, I just cover an IWB or even OWB holster with a long shirt or jacket and get on with my day. If someone happens to see my firearm, I don't really care. Legally, I am not in the wrong, so long as I am not brandishing. If it prints or flashes, I make a casual adjustment (if I even notice) and move on.
I got tired of being so concerned with it that I would wonder if I should even 'carry it to xxxxx' or such, so I decided that I would rather keep it close just in case than worry about what other people thought.
I've only been carrying for about 2 or 3 years, and I don't even carry every day at this point. (I am currently waiting on a new tuckable-iwb holster so I can carry at work, so that should solve that.) When I think back on how I was just a short time ago, I can't help but chuckle. I could come across 50 people a day who are also carrying and not even know it; nor do they know that I am.
That all said, I nearly always open-carry at the outdoor range here, and when hunting, which I don't really do at all.