Something else. I read a tip somewhere on the net (might have been
www.earthrounders.com) that if you ever do a round-the-world trip or similar in a small aircraft, and end up at airports that are not used to GA, it helps a lot if you do wear a proper uniform with whatever amount of bars suits you. I'd suggest four for the PIC, even if he/she is only a newly minted PPL(SEP) and three for the navigator (who might not have a license whatsoever). Not to brag or show off, but as a requirement to get taken seriously by the various airport staff. Sometimes they simply refuse to believe that someone in shorts can be capable of piloting a plane, let alone be the owner/operator of that shiny one there on the apron.
There's even guys who fly in shorts but change into uniform just before landing.