I always give first preference to men I have seen before. Then I would consider the quality of the initial contact, was it a on-liner email? Did he fill out my contact form?  How much information was provided that would make me feel safe with him.  Does he have at least 2 current references? If I already have someone booked, I will not cancel that person to book someone else. I would instead try to negotiate a different time.

I may have favorites, everybody does, but until I meet someone I do not know who those favorites will be.  If we have already met, you are already on my preferred list and are notified of all travel prior to any ads being posted.