I wouldn't say I'm a pin collector as such... Or more specifically, I do collect the pins I get, and I'm not so much into the trading thing ^_^
Anywhere I go, I try to find a tasteful pin in pewter, brass or gold for my "pin bag"... An antique-looking leather valise, more stylish than functional, which chronicles where I've been... I've got all my National Parks, National Historic Sites, Canadian Pacific Railway, etc. pins hotglued to that.
Disney-wise, I've only picked up a few here and there. Outside of the parks, I for some reason bought a "Headless Horseman" song pin and a "Nightmare Before Christmas" millenium pin. A now-deceased online acquaintance sent me pins of "The Haunted House" and "Davy Crockett and the River Pirates" before he passed away, knowing I would appreciate them. I have two 2005 Walt Disney Travel pins (one to keep and one to trade, which I never did) which came in the mail along with my tickets and luggage tag. I received a swanky gold "Walt in Walt's Footsteps" pin for going on the tour. The only park ones I actually bought were a 50th anniversary one for Disneyland and a 15th anniversary one for Disneyland Paris. If it at all counts, I did buy a Mickey sheriff star in Frontierland that had my name on it, since I so rarely find my exact spelling, for some reason ^_^
That said, I don't know if it's really weird of me to want to have gone to the Camp Pin-e-ha-ha event at Disneyland (I think it was last year, wasn't it?)... I wouldn't really have been in it for the pins... I just like Ranger Woodlore and Humphrey the Bear, and wanted the logo merchandise ^_^
Regarding displays, I actually have a plan awaiting execution. I want to get cases or shadow-boxes for my Mickey ears, and include my anniversary pins in them. I don't know what I'd do with the other pins though.