For me, it depends on how hot the day is. But I usually turn it off because I don’t want a bunch of stuff running when I start the car up next time, same as Ken. If I’m at work and I know it’s going to be 90 degrees when I get out, I’ll just leave it on.
I have known people who turn off everything before they park. The radio, the hearer/AC, the wipers , if on, turn the temp down, ETC. It dosen’t hurt anything, but dosen’t do any good either.