When you're watching a sporting event and you have no geographical or sentimental ties to either team, you root for...
The team who has won your admiration by their skill and strategy.
There is no team you don't have sentimental ties to - that coach once played on the college team two towns over when you were growing up.
You have meticulously researched the strengths and weaknesses of each team, placed your bet, and root for the team that's going to win you some money.
You don't root. You enough enjoyment from watching a game well played. You just watch the events unfold.
You wait till the mid point of the game, and root for the team who has displayed the best combination of skill, strength, strategy, and sportsmanship thus far in that particular game.
You aren't watching. Beaches is on Lifetime.
You aren't watching, you're playing WoW online.