Notice it all the time but don't usually bother with talking to the person as most people around here don't seem to care that much and think I am nuts. However down through the years I have gotten pretty good at identifying people with the money, interest and for sight to value a detailed car. Those types I target like a hawk! I only detail on the side so I can afford to be choosy.
Additionally my very understanding girl friend has developed a healthy interest in maintaining the appearance of her vehicle and quickly notices and comments on the finish of other cars parked around us! I think I've created a bit of a monster...lol The other night I was doing some paint correction on my parents pearl white car as they were visiting for the weekend. I was just about finishing up in the garage and getting ready for a final wipe and inspection as she walked by talking out the trash she commented on the fact that I had missed a small light scratch on the hood. One that I had to look for at a few different angles to even detect! Detailing is infectious and I am with out a doubt a carrier...lol