I have Pirate Mickey, Sorcerer Mickey and 50th ears. I wore the 50th ears during the 50th and now they are on our shelf of collectibles. I do wear the other two anytime we are in the park though. Usually alternate between them. Wearing my Sorcerer pair got me a hug from Sorcerer Mickey (I'm a big fan) himself as he walked by once.
I even wore my Pirate ears to the POTC:AWE premier. Got more comments from people on those ears than people who were fully dressed up as a movie character got.