I also have a solid wooden front door that can only lock inside with a key (the type that you push the handle up before you turn the key to lock it). Always leave the keys in all night (it's nowhere near the letterbox).
Having had an elderly neighbour who had an Age Concern emergency buzzer I would say never leave your key in the door. She fell one night and we spent ages fiddling around with screwdrivers etc to push the key out of the lock before we could get in to help her.
Until today I left the key in the lock but I forgot to lock the door last night so the new routine is lock the door and move the key so I know I’ve locked it - no one else in the house is bothered if the doors are locked or not.