I like having an audience. Sometimes just a riskly location is hot, even is no one else is looking. Some of the most public places I've been sucked include the 4th street Path train platform in New York City, the parking lot of the Hoboken, NJ police station (we didn't realize it was the Police lot until later), the middle of the lobby of a Chicago hotel, the beach, street festivals...
In private, I have threesomes, groups, or sex parties often, although the most interesting was the time a guy wanted to suck me while his wife watched. (I never could quite figure out her facial expressions.) On the last few group camping trips I've been on, I've always seemed to end up with my cock down somebody's throat while standing around the bar area or sitting by the fire.
And then there are the backrooms and patios at bars. Sometimes I get interesting comments. I remember last time I was in San Francisco, I was getting blown on the "smoking patio" of the Powerhouse, at a time when it wasn't two crowded. This guy from the other end walks over, takes a better look, then goes back to his friends and says "You're right! That is a real Daddy Dick!"