I tend to shout at the TV a bunch. However, I get distracted really easily too. This is problematic when I miss crucial events and then "tune" back into the game only to be baffled about the current game situation...and then the shouting happens again.
OR, if I watch a game with Clams or some other talented conversationalist, I usually end up talking about crazy crap like alternative fuels supplies or excorcisms for like an hour and miss most of the game.
Mixed bag is what I am saying here.