I'm not all that hung up on looks. I do prefer slightly slimmer women, but honestly, average-ish looks are more than enough for me. What I'm keen on is someone that is sensual, into the session, and pays careful attention to me. I can't stand someone texting during my time unless it's an urgent matter.
Generally speaking, I've found that the younger and more attractive the person is, the less likely I'm going to receive good value and the type of session I really like. Of course there are exceptions, but the market says young pretty women can command higher prices for average service, and I can live with that by seeing more average looking women that offer great service.
Ann, formerly of XP/KLMT and now at O is a prime example of that. If you saw her while you were getting groceries you wouldn't think "omg, that's the most beautiful woman I've seen in ages" and you're actually not likely to notice her at all as she's pretty average, like, well, almost all of us. But, her skills with my body? Can't speak to the rest of you, but some of the best sessions I've had have been with her. Value? For me, amazing.
In a dream scenario, would I like a gorgeous young woman that gave Ann-like sessions and charged what Ann does? Hells yes. Does it exist? It does, but it's rare, and usually short lived as those women quickly find out they can charge a lot more and give less.