Bloody loads of them, like Hugh I started before leaving school picking spuds, strawberries etc, then into an apprenticeship with British Steel.
After that the World (well the UK) was my oyster, (does contracting count as one job or 57? lol)
An interesting variety of short term jobs between contracts, giving an insight into stuff that many never experience.
The ones I hated most in all that time were in management roles, I just couldn't get on with the back stabbing and 'political' shite that went on from people that desperately wanted to climb the ladder . . and then usually spectacularly fell off anyway.
Would I change anything?
Two things: I really should have joined the RAF as an Airframe Tech after leaving school, and secondly shouldn't have let the first wife talk me out of us emigrating to New Zealand