Just completed trip #3 over two years to Curacao, and dove my DH each trip. The new DM with thedive operation was a little puzzled, and the others said, "oh yeah, he does things a little different". He had never seen one before - Damn kids..... Anyhow, they haven't said they have seen any others, and this trip, there were no questions or photo requests. Perhaps I have become common.... The Germans were really curious last year.
Someone did ask if I was on a rebreather when I first took it out at the shop... LOL.