Would love to spend longer, but that means to spend more. It's the basis of everything. The below is IMHO, and as relating to someone I've already met. For new playmates, I prefer a one hour chemistry test to start.
30 minutes is too short a time to reconnect at least a bit AND take care of the biological imperative. Not interested in quickies that are nearly anonymous. Well, most of the time. Except by surprise. Or opportunity. Or at a party. Or if we might get caught. Or...
60 minutes is OK, but feels a little cramped. Not a lot of slack time, better keep things moving.
2 hours gives you enough time to relax, talk, play and get seriously into it, without totally busting the budget and you have time for some afterglow cuddling and talking and stroking and maybe another round. Having the luxury of the extra hour lets you slow down, relax and get more sensuous in addition to sexy.
3 or 4 hours would be heaven with most of you ladies, decadence galore! A W.C. Fields quote: "Drowned in a vat of beer. Death, where is thy sting?" for those of you old enough to remember and appreciate Fields. He was fond of his vices.
But that much time would chew through a significant chunk of the annual play budget!
If only my discretionary income was unlimited...
I've decided on 2 hours with my regular (with a little extra OTC for favors), but it means that I can only see her half as often as I'd like! Most things in life are a compromise, I'd like the time together to be a bit less of a compromise.