http://eccie.net/showthread.php?t=399870
all providers should read this. (It is a sticky thread on this forum)
Every hobbyist is different, some like a sloppy bbbj, others love the dt. So it is not possible for a provider to be the perfect one for each hobbyist.
A provider will know if she is doing something right for that hobbyist when he becomes a regular. That is in looks and service.
Ultimately, it is up to the provider if she wants to improve her sessions to pull in more clients.
But, the above thread is a good start imo