When I first started hiring about a dozen years ago, I rarely went back for seconds. Not for any particular reason, just because I found the variety exciting.
Coming out of the pandemic, I did lock into one regular guy who was and is great and we began to become friends in a way. Our "relationship" went to a different place (seeing movies together "off the clock," checking in when life got complicated, etcetera) but I soon recognized that we would likely never really be able to be in each other's "real lives" without it getting complicated, so I scaled back on meetings with him. Boundaries are important in this hobby and it seemed necessary to recalibrate.
More recently, I've not had great luck when "sampling the offerings" so have been more inclined to rehires. Mostly to get past the getting acquainted phase so that we're both able to relax into the encounter. One gent I've been seeing somewhat regularly lately isn't the most dynamic but he's gorgeous, kind, easy to be with, the pieces make for a great fit, and our time together has been reliably gratifying. Which I consider a definite win and a clear reason to book him again. But I think he's one of only three gents I've booked 3+ times.