It varies for me, time is always tight for me so I rarely can afford to do the research I should. Almost everytime I check out ers and bp and less often city vibe (when I have more money to blow) and make a call - my feeling during the call tells me whether I will go or not. This method has failed me miserably probably 20% of the time overall but I have had slumps too. And after each slump I tend to make the time to do the research or go back to a provider I personally have enjoyed in the past. I think I have gone back to the same SP about 3 times ever, other than slump recovery times. I poon for variety. In a way I am fortunate because my wife is beautiful, tight, a wonderful lover and fantastic fuck when it is about fucking and not love making, has kept herself in great shape, and I crave variety. I have never experienced a better lover (mental) and only a few times a better fuck - Dahlia Dawn (deepthroat greek), Only Mia (encouraged hairpulling and ass slapping and vocal), Taylor Made (deepthroat, tight, and more), and a couple classy ladies who just carried the whole deal off with class. And then there was this time I got a great blowjob from a dude who looked like a lady. It was a dark and stormy night . . .