Cosplay! Who does it? Where do you do it? Who do you dress as?
As for me, I can't say I do much of it. I dabble, a little. I don't do cons. I sort of did the steampunk thing when it was trendy. It was interesting to say the least. Once long ago, we had a small gathering at the Getty in LA. Multi-million dollar pieces of art hanging on the wall, and everyone is following us around and taking our pictures. Sort of surreal.
Other than that, I do a pirate. Not a captain, or anyone in particular. Just sort of a general deck hand. I went for historical accuracy rather than the typical movie pirate stuff. My entire costume is purpose built. Once a year, I attend an event with a group of like minded individuals. We all dress up as pirates, and drink ourselves silly. Imagine being in a bar, when a group of 30+ pirates storm in and take over. It's quite the site.
I've done a few cons with the kids as they've grown up, mostly anime (AWA, Anime Midwest) or sci-fi (Dragon Con), though I tried my first Rennaisance fair this year. Characters: Edward Elric, Graham Specter, steam punk female, Federation Starfleet crew, village maid.