In a provider?  Ease of scheduling, sensuality, promptness,  what means the most?

For me, it is undoubtedly some form of sensuality.  I like to feel like I am a bit special.  I know that you have probably been with several other guys already today, but I want you to make me feel like somehow it is fun and relaxing for you to be with me.  Do something to let your guard down a bit.  Show me a little of who you are.  Show me some emotion beyond horniness (if you are sad about something, tell me.  If you are excited, tell me...  Especially if there is something that is going to turn you on, or something that you don't like or it hurts or something, please tell me) - you don't have to actually give anything away that compromises your anonymity.
I like to know that you understand that I'm nervous...  It is new to me.  I'd like to believe that you are a bit nervous too.  That even though you've done this much more than me, there is still some trepidation on your part.
The overarching theme is - connect with me.  I'm here for more than just sex.  I hope that you are too.

END OF MESSAGE

Sensuality during the session is a given. Without your focus on us having a good time, you will not be getting a return visit.

Other than that good communication (not necessarily a lot) before the date is always a plus.

time we share together to seem special as in a real GFE experience.

Obviously the business part of the arrangements are important too. Our time is valuable as is the time of the provider. When we ask for a date via email, get back to us in a timely manner and be on time for our date.