Since seeing the Yankees in New York in 2010, I have been following baseball. I support both the New York Yankees and Mets, although in the subway series, I support the Yankees. When I'm in a stadium where neither are playing, I support the home team. Every time I visit a stadium I buy a stadium ball and put it in a dedicated cabinet virtualised below:

ALE
ALC
ALW
NLE
NLC
NLW

Of course, it's not all about Major League Baseball. Minor League games are also good and sometimes they can be better than Major League. Here is my meagre minor league ball collection.

Utah