1. My Cthulhu for President button--that last surviving item from a "press kit" I bought at a game store some 20 years ago.
2. A t-shirt that says, NEVER UNDERESTIMATE THE POWER OF STUPID PEOPLE IN LARGE GROUPS.
3. A t-shirt that says, I REFUSE TO HAVE A BATTLE OF WITS WITH AN UNARMED PERSON.
Item #2 was purchased for me by my wife. "When I saw it, I knew you had to have it." It has caused at least two observers to become offended upon reading it.
Item #3 was purchased for me by my mother, who made essentially the same comment as my wife did about item #2.
My life-sized poster of Jim Morrison, alas, did not turn up during the move, although I kept an eye peeled for it throughout. I don't know what became of it.