My favorite tools would be my M12 1/4" impact and my TIG.
I notice a lot of folks naming a ratcheting screwdriver. I've never even held one, but now I'm thinking I may have to get one to try out one of these days.
Then 'shipyard spanner' - also known as 'the beyond bmfh' used to hammer rivets on liners like the titanic (which I would stress was working perfectly when it left Belfast - I knew we shouldn't have let an Englishman drive!)
I replied earlier that I too have a knife on me if I have pants on.
Answering your question- Silly me, I keep a pocket watch in the watch pocket.
I have always carried one since I don't like wearing a wristwatch, and even now I am the odd one that I don't carry a phone on me so I still carry it.