I got sick of collecting baseball cards right as Ty Cobb's granddaughter flooded the market with his signed checks. It made me catch the bug of HoF autograph collecting. Finally a couple of years ago, I made a website.
http://www.cooperstownexpert.com/
There's a page for every HoFer and many non-HoFers. There's 30+ years of collecting on it. If you have a favorite guy and want to see his autograph, it's probably there.
Can't imagine how different my life would be with all that time devoted to something - anything! - more useful.
Cool stories from everyone by the way!