First choice is any game my son is playing. Although I have to admit because he is often a DH I miss him being on the field the whole game. There is nothing better than seeing him get a hit but I miss the action of both parts of the game.
I love to watch MLB and college on TV but I also really enjoy listening to a well broadcast game on the radio. I grew up listening to the Washington Senators on a tiny transistor radio and still love hearing a game broadcast by a good radio guy. I think I even appreciate it more after listening to some of the announcers we get on the internet from the college summer leagues. That can be an agonizing experience.