My suggestions for providers involves a 12 step program.
1.  Greet your clients with a smile and kiss
2.  Help him undress
3.  Offer his help to undress you
4.  Show off your body
5.  Tell him you want to shower with him
6.  Invite him to wash you first.
7.  Wash him and kneel down to rinse his bottom
8.  fondle, kiss and give a preview BBBJ
9.  Back in bedroom, ask what he likes best
10. DFK, and only give a light sensual massage to start his engine
11. Smile, be sexy & playful, kissing, licking and talk dirty.
12. Fuck and suck like he is your boyfriend

This is what earns a good review from me.  I also like a good rim job or at least a little butt licking and ball licking.
A blow job that concentrates on licking and sucking the knob and shaft of my dick is also appreciated.
I am an older gentleman and these things help me get it up and keep it up for a while.
If there is any pain or discomfort, let me know, but in a nice sexy way, not with a dirty look.
If your reviews or website claim you offer certain services, then deliver them as promised.
A girl who meets my expectations will get a great review and will get me coming back for more.
I have 3 providers who I watch for to return so I can see them again.