Can't speak for others but weekday versus weekends makes a big difference for me. I'm working during the week so hobby time is limited to visits around a work schedule whereas weekends are usually open with planning.
My favorite time is early morning, starting between 7:00am and 9:00am. Two reasons for that. The first is I really like early morning sex. The second is that I think that gives me the best chance of being their first appointment for the day. That is just a personal preference of mine. But I have not found many providers that are available early morninings. So I usually settle for appointments around noon.
Early morning = Lots of morning wood that lasts for a long time, hard to push me over the edge. If you're a multicummer then I'm all for this. Making you cum 4, 5, 6+ times in a couple of hours since it'll take a lot for me to get one this early.
Lunch/Early Afternoon = Everything is pent/built up by this time, so balls are in your court. Can be ~15min or we can make this last a couple of hours. Usually a one and done, though. Only the extremely talented (or dirty?) have gotten more than one from me.
After 6pm really isn't immensely popular. Half my time in Dallas, I just plan on being "done for the day" by then because seldom does anything happen after that.
I have a fairly flexible RW schedule so I tend to see friends during all of those times. I get a lot of lunch and dinner date sessions. If a guy wants to play he will definitely find the time.
10am-2pm is my favorite time to play, as is 6pm-10pm. When I am in the DFW area, I often have requests for both of these time frames, more than any others.
I visit Dallas a few times a year. I'm usually here for about 3 weeks.At home I tend to really like 9:30am- 10:30am starting times. While I'm in Dallas, I tend to only be able to play between 4pm and 9pm because of either my work schedule or the ladies schedule.
Weekends are different. I like about 2pm.
I do tend to schedule 2 hour sessions, so that plays into the scheduling challenges.
You certainly have some excellent providers in DFW.
I tend to be in the 9pm-12pm, but I usually only hobby when I'm traveling (lucky for me that is usually in the Dallas area!) I like that time frame because once everything is over, all I have to do is shower and go to bed once I get back to my hotel. Or just shower and go to bed if it was an outcall. I've tried during the middle of the day before and always feel like I go back to work with that fresh fucked look on me.