Evan! said:
I've got the only autograph that really matters:
John Schneider
I saw him at some swank reataurant in downtown Chicago (the name of which escapes me but it was within walking distance of my hotel on Michigan Ave) when I was last there a couple of years ago. Didn't get an autograph, but talked to him a bit. Very cool guy.
As for autographs, mine are all sports related. I have a picture of Lou Gherig and Babe Ruth that was autographed twice by each of them. The original was autographed and copied, then my grandpa some how got it autographed by them again. He gave it to my dad before he died, then dad gave it to me. I can't verify it's authenticity, but my grandpa sure did love telling the story about how he met them and got them to sign it so it's real enough to me.
Barry Sanders on a full size Lions helmet, Barry sanders on an authentic jersey.
I have a ton of Detroit Lions autographs from back when they had training camp in Saginaw and I'd go up there every year.
Lots of autographs on baseball cards of players back in the mid 80's to early 90's like Roger Clemens, Kirby Puckett, Daryl Strawberry, Dwight Gooden, Barry Larkin, Don Mattingly, Ken Griffey Jr.