Other than baseball, I have done volleyball, basketball, and inline hockey.
Baseball is still my number one sport. I do basketball for the exercise to say in shape for baseball, plus it's hard to beat the atmosphere of a packed gym for a rivalry basketball game.
I officiated volleyball for 3 years before I started coaching my daughter's CYC team, but the practices and games left little time to officiate.
I still do inline hockey sometimes, but it's mostly just glorified adult babysitting and trying to prevent fights. It is great exercise, and forces you to learn to skate well, quickly. I learned early though, if they're going to fight, I let them. I'm not going to risk getting punched in the face.