"As he usually does, he blamed his assistant for not blocking out the vacation time so he couldn't book me. I said so you didn't know when your vacation was when you booked my May appointments?"

Some people are just that considerate to "remember" that he has appointments to cover and obviously your T is not among them and he has his assistant as a nice excuse.

"I forgot how we got on this subject but he talked about how there are six people who see him weekly and have for years and they are "insufferable" but work hard and he enjoys them. Most others come and go or see him week after week and do not want to change."

if he didnt bother to think his intention before he opened up he'd better shut up.He takes the payments in hour and its his duty to be reponsible for every of his patients instead of those he might "enjoy".