There is a place for 30 minute appts just as there is a place for longer ones. I used to be into:
1. early on in my hobby career almost always the one hour, multiple pops sessions
2. as time evolved, and I found a few semi UTR regulars I likes, a one hour single or multiple pop session with a regular who really knew what I liked and who I could count on for the right amount of foreplay
3. then in recent years mainly the 30 minute single pop session
Alas given the lack of quality in the Pittsburgh market, I am much more likely to stick with the 30 minute session these days. Now if there was someone who offered some exceptional or unique services, I would consider an hour. But most providers these days prefer to get you in and out the door plus my days of needing multiple pops are mainly past (not to say it doesn't happen with the right circumstances but it is not a burning desire). And sadly, the semi UTR regular types I used to enjoy spending an hour with can't be found these days