Best was my own long term profession , antique dealing, before bureaucracy took over and wrecked it.
Jumping into a fast car every morning and haring off to search for fine antiques amongst the trade shops, warehouses and auction rooms throughout the country. I liked always to be home every night to sleep. My vans would follow up within a few days and collect what I had bought.
Free as a bird, no-one to answer to but myself, and then came years when my sons would go off with me. I travelled great distances fast each day, but although I did travel USA when I could, I realised that doing the same would be impossible there because of the great distances between target areas.
My worst job, and I had a few of those, was digging deep drainage trenches to serve army barracks etc. After demob.
Or working night shift on a paraffin grinder, producing 1200 car pistons every night, for a pittance. After demob.
Hardest work was Merchant Navy, long hours, hard, and very fast pace, seven days a week, never a stand-in to fill in.
Army was different altogether, different world.