Quite interesting, this.
I don't wear shorts, because I get too many girls chasing me.
Although my main reason is I simply don't find it cooler, and my little pins need protecting as they are covered up for 11 months.
As for image: I have contractors who expect me to wear uniform & name, that's their requirements. I'll stand on my head and sing "O Danny Boy" in Gaelic if they want me to & pay me enough!
I also have a very important Stately Home owner, who does not require uniform nor van livery. In fact the management team there are not impressed by it, and prefer non-gimmicky images, just men/women who know what they're doing.
So both sides of the coin for me. But just because some have got big posh customers don't let that influence. Nor worry too much about long drawn out posts of moderators
Ian Giles gets like that sometimes. They are not the last word on our skills by any means.
Dress neat & clean, and speak well.
May the force be with you