I have a lot of hats. Several Pork Pies, a couple of Fedoras, a couple Flat Caps, a Boater, some other straw hats, and a nice Top Hat that I will sometimes wear even with casual clothes.
Purple is the favorite color of both my wife and I. I have 2 purple game stools, 8 purple ties, a suit with purple pinstripes, purple hat bands and feathers, and on and on. I also rebuilt and customized a 74 VW Bug which I painted purple. Some people think that's fruity or something, but I think my stuff looks good. Damn good.
So I guess the screen name is a combination of two things that I'm sort of known for. I don't actually own a purple Top Hat, but I wouldn't be against the idea...