I had one customer who asked me if I was a Security guard. She thought I was a plain clothes Police officer. When I told her I was a private citizen, she asked me if it was actually legal to carry a firearm, and I said yes.
I had another guy ask me about what weapon I was carrying. He was actually surprised I was carrying a Hi-Point C-9.
I've also had a few "negative" comments from people who didn't exactly like the fact that I was carrying a firearm, and have had two businesses tell me not to return with my weapon on me.
I've had a few stares from "actual" Police officers. But so far, none of them have said anything about the fact that I carry. I did however have one officer greet me one day as I was leaving my apartment. (Chuckles) He actually thought he'd seen me somewhere before. He thought I might have been "on the Force." That actually was kinda fun that he thought he'd recognized me as an officer. I guess it was because I was carrying my "holstered" C-9 that day.
I almost scared a woman at the Supercuts in Overland Park, KS. She didn't like the fact that I had my weapon on me while I was getting my hair cut one day. She said my weapon was making her nervous. And the other two hair dressers that were there really didn't seem all that comfortable with it either.
And as I was filling up my car some weeks ago, I had a former Marine ask me about open carry and what weapon I was carrying. He also asked me about if it was legal to open carry. I told him yes, and I filled him in on some information that I thought he should know. He also said he was planning on open carrying as well.
So, I've met a few interesting people and had a few not so good reactions. All in all, it's been pretty positive.