Baseball memorabilia, esp. NY Yankees from my past and present (mid-1950s to now). I used to attend a lot of baseball card shows and had a chance to meet some of my heroes. I have signed/framed photos, signed baseballs, signed bats.... but none are on display because I haven't gotten around to putting them up in my new house (moved in Sept. 2003!).
With Whitey Ford in 1998:
With Cal Ripken, jr. in 2002: