Well, because it's subtle, it's hard to define. I've hired some of the absolute top names in the biz who are some of the favorites of many on this forum. While they exude confidence (rightly so), they also make me as the client feel appreciated and valued. This guy made me feel the entire time like I should be grateful he gave me the chance to pay to be in his presence. I can't point to a specific thing, but it's the feeling I had the whole time. But again, his body, his cock, his sexual performance are all excellent, so if you don't mind that kind of attitude, I'd say go for it!