Just for the heck of it, I'd like to find the most ... we'll call it "unique" (and by unique I dont mean the "They only made 3 of these" kind, I mean the "I've seen a shitload of those but I've never seen one like that before" kind) Cap I can and post it here. So far, these are the best I've found but I'll be keeping my eyes open for more good ones. If you have a photo that you think would fit here, by all means, me an email and I'll put 'er up.

I think the Duke's in 1st place so far ...

"Snooks" Everard is sportin' a dandy

Wild Bill "Grizzle" Klersy lookin' mighty sharp

This one got even better but so far so good Buck

To many fighter pilots during WW2, having a well-worn cap was like a badge of honor. It meant you'd been around for a while - no "Sprog" here. Most could get away with it in the field to some degree, but it became more difficult as your surroundings grew more civilized.
George Beurling, still wearing the cap that went through everything with him, including Malta & "the crash", was stopped short when he tried to exit the plane in Ottawa - after all, he was about to meet the Prime Minister. His hat was yanked off and a stiff new one was placed on his head.
Looks like George aint too crazy about it but Prime Minister Mackenzie King seems pretty pleased. Too bad about the cap George, I would really like to have seen your good one ...

Screwball Beurling and P.M. MacKenzie King