Slightly off thread I find a lot of pilots do not turn the fuel selector to OFF at the termination of a flight.
I never do. As Part of Pre-flight I do check it is movable and turn it one time left-right-both-off, so at latest upon engine start I have a fair chance to see trouble on the ground. If I would turn it off, fuel may evaporate during parking and the lines may not be fully filled (had this once a couple of years ago), plus with open valve any small leakage in the fuel feeder will be smellable.