I mostly prefer half hours especially on the first meeting.
Some thoughts (a bit general, just my opinion/experience) :
‡Except for clockwork prossies, a half hour is more likely to run over than an hour; and an hour is more likely to run under. So a half hour is better value. Paying three figures, for me, seems to suggest that punting is a more important part of life than it really is or should be. BUt if £120 is nothing to you, so be it; if you pay more than £120 I'm saying nothing (rolley-eyes emoticon).
‡Most prossies offer a better rate for the hour, so if you know you want to spend that long with her, an hour works out better value.
‡An hour needs some planning. Either by you (assuming you can take the lead) or her. This is why some prossies actually prefer half-hours (more mindless, less hassle).
‡Many prossies don't have enough to hold my interest for an hour. They are not that bright or imaginative, in or out of bed* (especially when you have seen a few hundred). The ones that are can be sifted out in half an hour and hotlisted for a future punt.
‡Prossies are pretty expert at wasting time (especially when it is your time for them to waste). Having a half hour is a disincentive to waste time as there is stil an implicit requirement to "do the business". I usually have a mental shopping list ready, keep a discreet eye on my watch, and plan the amount of time I want for warm up (if any), oral, fucking, and cumming. Chit-chat ("her personality lol") is nice if she is so inclined on her time (after the 30-minute mark). As I said, most prossies that are not on tight appointments will happily run over a bit with a half hour. An hour gives them too easy excuse time for freshening up afterwards, gracing you with their life-story and (for outcalls) nursing a drink you have been generous enough to provide as if they had saved up and paid for it themselves. Always have a plan. Always take the lead (politely, smilingly, nicely, gentlemanly even, but quite clearly and firmly - she'll soon tell you if anything you expect is not on her "likes" list!) Most of them like this. Saves them having to think.
‡Unless you like GFF (girl friend 'fantasy'), two well-priced half-hours can come to the same as an hour, and you can two girls for the same expenditure (eg one in the afternoon and one in the evening). A fresh fanny can be quite a turn-on after one you've already fucked senseless that day, so better experience.
‡If you've followed the "save her having to think" rule mentioned above, and decide at a later date to book her for an hour, she will be happily primed and welcome the oppportunity to lie on her back and get fucked without worrying about what she needs to do to "please" you.
*I should say "on bed" (how many prossies do you know that do it in bed??)
