I used to go in the morning, but recently I was told by one of them that she is so sleepy in the morning she prefers an evening session.
I know it depends on a girl, but what is your preference ?

During the week I usually prefer afternoon or evening appointments depending on the location and my work schedule.  On the weekends the morning or early afternoon work well for me.

I guess one advantage of being the first of the day is a possibility of skipping the shower time (assuming you have already taken a shower in the morning) and give yourself extra 15 min of real actions.  Sometime, when I get that last appointment, I can not help but look at that trash can in the shower and see 20 used paper cups and get kind of depressed.  This girl told me she has more energy for that last appointment because she is so happy that it is the last one for the day.

the reason being from my experience....mondays and mornings and weekends and evenings are the busiest so i tried to avoid those.  guys hog mondays and mornings because guys think the girl is rested and fresh and more likely to orgasm with them.  weekends well no work.  and evenings same deal guys get off work and also because no matter how much girls try to manage their schedule they are human and after seeing like 6 or more guys it is inevitable they are tired by them so performance below par.

totally horny in the mornings

Not to sleepy and not worn-out, so to speak