i am new to this site but not HVAC. I have been doing this for over 30 years and actually have decided I do not really like it much any more. I hate doing maint which is just part of the job but it gives me hours during slow times. I still like to do service though as sometimes I actually have to use my brain. I have noticed that (at least around here) there are to many HVAC techs that take no pride in their work. A lot of them are under qualified and over paid so I guess this is why I don't like it as much as I used to.
I know R410 is what we have now but I still like R22 better.