I consider looks, price, location, attitude, booking requirements and services available...
Looks does play a big part, I do want to fuck a girl I find attractive, but the other factors always have to considered too. An average looking girl, who is dirty as fuck, with a good and enthusiastic attitude, and is convenient and not too expensive to punt is probably going to get my priority over a fit as fuck prossie who is expensive and inconvenient to book or get to, and who may not be particularly enthusiastic and who doesn't do key services such as DFK, OWO, RO, or other services such as anal or CIM/facial/COB.
It depends though, she could be FAF with limited services but convenient and cheap. Wouldn't rule out a girl like that. She could of course be FAF with the services and attitude being right, but she's expensive and in high demand, so difficult to book. Girls like that I will consider, but ultimately if it's too much bother and expense for me I probably won't bother with her. Point for me, is I think it's best to find a girl who is good in all those areas, a reasonable price, good looks (but not necessarily the most fit prossie ever) good services and attitude, and not too much of a hassle to book, my best punts have all been with WGs like that.