@AbramKedge Years ago, I worked as a marine engineer (I fixed outboard and inboard boat engines) in Inverness.
One of our customers was a right scruffy gent. I treated him like all the rest, he had a boat and an engine so he obviously had a huge mortgage or loads of cash.
My boss asked me afterwards if I knew the customer. I didn't, so he told me. Iain Anderson of Jethro Tull.
Never judge a book by the cover!
@NormanDunbar that's awesome, is a great attitude to have. After dropping out of uni, I spent five years working in international moving. I met all sorts - from East end gangsters, through to the ambassador for the Ivory Coast, and Lord and Lady McDonald (twice) ((she was lovely, and was absolutely paranoid that someone might throw away her fragrant hickory twigs)).
And then there were the people I worked with, some very rough and ready, some who'd surprise you, intelligent problem solvers who just decided that they liked a job where they were left to do things the way they thought best.
The big lesson I learned was to listen - no matter what my first impressions, everyone has something that was worth hearing.