I say, If your open carrying, EXPECT to be stopped by citizens and LEO's for questions or just plain curiosity. If you don't know how to handle conversations with strangers or are very shy, OC might not be for you. But if you are well versed, know the laws in your area, and can have a mature conversation with the other party, then you are golden.
Always good to play scenarios over in your head and try and practice what you would say if you are confronted by law enforcement, or a very angry and/or Anti-Gun citizen.
Age makes no difference when Carrying, it's the mentality. I've met some 30 and 40 year old who are so immature i can't stand to be around them. Then I've also met some like-minded people around my age that are very mature and experienced for their age. So play yours cards right, BE VERY AWARE OF YOUR SURROUNDINGS, and you should have no real problems at all!