You have to try get as many regulars as possible: so be as half soaked as you like, two-faced, lie, fake your orgasms, say anything to make them feel special but make sure to do it in a way that you are genuine about it all, its all about convincing them that you really like them - THAT is what they are paying you for, not just the sex.
Personally speaking, if they aren't overly smelly, or have bad breath, very obese, very boring or are a horrible person, then I'll do almost anything to keep them coming back for more. Regulars are like financial security for when the phone is basically dead.
I got loads of regulars, when I'm having a slow few days I'll text some of them with things I think they will love which I don't mind doing with them that I otherwise wouldn't usually do.