So I am new to the hobby, which providers offer the best Greek?

But what make it the "best Greek"? How hard and deep she can take it? How tight she is? That no dookie gets left on junior? That she screams out "bwahahahaha" as you ram down the Hershey highway? That she goes ATM? The question is too open ended and you will get many flavors of answers. Are you looking to pop your ass-cherry or looking for a rodeo ride? Be specific and we can help.

Otherwise, search the reviews and filter to anal "yes. Then read, read, read reviews. PM those reviewers as well and ask more details.

This is an interesting question and I concur completely with the dead-on response. I usually go by enthusiasm, facial expressions, and vocalizations.  then there is the power of sheer observation-if you show up for an incall and there are butt plugs and lube in plain sight then you know you've hit paydirt and there is kinkiness to be had.