Don't know if it's a hobby but I collect Fisher Price Great Adventures. I have since I was a kid. In fact I wrote a letter to Fisher Price and told them some ideas like Robin Hood. Next thing I knew a Robin Hood set was out. Not sure if it was me that caused it but still cool nonetheless.
For people unaware of what Great Adventures are here's a link
http://greatadventures.coupleofbucks.net/ btw I have a few items he doesn't.
Btw Super Waffle I love Fushigi Yugi.