Besides Star Wars and Marvel Legends, two other things I collect are state quarters and golf balls.
I'm all caught up on the state quarters up to the coin released before Missouri (the current one). My grandfather is usually pretty good about getting these when they are released and gets them in a roll and then hands them out to all his family members. Well, for some reason, he decides to hand my wife the quarter instead of me. I told her to keep track of it and not to lose it, blah, blah, blah. What does she do? Who knows, but she no longer has it.
I played a few different courses this year and noticed most of them have a golf ball with their logo on it. Since I already had the golf ball display rack, I became obsessed with getting a ball from every course I've played. Granted, some courses don't have balls and I suck at golf, but its fun none the least.