Spend hard earned money on new women
Good rapport is no more than good customer service. So you have your all time favorites. We all do. And there is nothing wrong with some repeats. Some girls deserve repeat customers more than others. YMMV, etc. But how many repeats do you do before the "relationship" becomes a deadend? Five, ten, fifteen, twenty? Will you ever be "friends" with her, assuming you care to be friends and care about her well being as a person outside of a business relationship? If she will never see you as a friend, or you would never consider her a friend, why do repeats after a few sessions together? The quality of the sessions will not necessarily improve with time. Just as likely it will deteriorate. If you have all the money in the world, and money is no object, do whatever you want. But if your hard earned money is limited, I say you spend most of it seeing new providers.