Just make a nifty little list.
NFL - Dallas Cowboys
NCAA(all sports) - Florida Gators
MLB - New York Yankees
NHL - New Jersey Devils
NBA - Dallas Mavericks
MLS - FC Dallas
Premier League/lower leagues - Manchester United, Rochdale
NASCAR - Jeff Gordon
Golf - Tiger Woods
Tennis - Andy Roddick/Maria Sharapova
Poker - Daniel Negreanu
If I think of more sports I haven't posted a team for, I'll post them.
So, what are your teams? Why do you like them?