What I liked - a car group with 'fun' people. That made it go well sometimes. Also, there are some genuinely nice householders that can make it nice.
What I disliked - leading out. When I led the group out, I felt lots of stress. Having a room full of people with little or no idea of what they want to do or who carried no territory made things difficult. There were times when the elder conducting the other bookstudy that met with us did not show and did not call me or anyone else, and there I was with one small chunk of territory and 10-15 people looking at me. And forget asking them to improvise and do some street work or something. Then there were those who always seemed a bit peeved at the arrangements I made. Sorry I couldn't always pair them up to their liking or get them into a car group with their favorite folks, but hey, I never learned to read minds. Also, when reviewing the presentation from the magazines, I could tell that practically no one had bothered to read them or prepare anything to say (couldn't blame them, but still, it was a pain in the butt to sit there and try to fish out some comments. It always amazed me how so many jws will offer magazines that they themselves had not bothered to read).
Also, driving around and making RVs. I would rather walk, get out of the car, get some excerise. But there are those who are content to drive around all morning long, even on a nice day. I understand why, but still, my legs would at times ache for some work, and on Sundays especially it's assumed that everyone wants to do calls.
I hate loaded cars. Some brothers had this thing about wanting to cram people into the car. I hate that. Just recently, we had 3 in the back seat and that was torture, because it was a Sunday and the group wanted to make calls. Yeah, let's cram in and drive around on a beautiful Sunday morning. I hated every minute of it. I got home and said, 'no more of that'. I haven't been out in service since.