You can start focusing on some kind of funny things. Some folks focus on a slow-boiling hate for announcers (I personally cannot stand Ken Rosenthal) or your favorites. The game pauses enough to become familiar with what's going on in the stadium - see the Cup Snake that forms in the bleachers at Wrigley.
But, also, people are on-camera - especially behind home plate - usually not aware of the cameras. Over the course of a game, you may notice particular people, like and excited kid or a partner who does not want to be there. Less often do you note "regulars".
But very early on in our Cubs-watching, we noticed "Pink Hat Guy".
His seat was directly behind home plate. He never wore Cubs blue, but always wore a bright pink cap.
You knew two things:

