I can't pick just one in most categories, though I highlighted favorites, sorry:
Football: Radio, We Are Marshall, Friday Night Lights, The Blind Side, Remember the Titans, Rudy
Baseball: Moneyball, A League of Their Own, The Natural
Soccer: Bend it Like Beckham
Auto Racing: Rush, Grand Prix, Bullitt, Gone In 60 Seconds
Surfing: Riding Giants, Step Into Liquid
Golf: The Greatest Game Ever Played, Caddyshack, The Legend of Bagger Vance
Boxing: Raging Bull, Cinderella Man
Other: Seabiscuit, Secretariat, Wind, Captain Ron
Football: Any Given Sunday - just because of "the speech"
Baseball: Major League - we wear caps & sleeves at this level, son
Basketball: Coach Carter - love the message and the actual basketball scenes are great...those guys can play.
Hockey: D2 The Mighty Ducks - because 'Merica
Soccer: Kicking and Screaming - admittedly not a soccer fan and don't know any others without Googling
Auto Racing: Fast Five - watching The Rock and Vin Diesel go punch-for-punch will never get old
Surfing: Point Break - corny Keanu Reeve's lines crack me up
Golf: Tin Cup - because everyone's inner child needs a spankin' once in awhile
Boxing: Cinderella Man - one of the few movies that will make me stop what I'm doing, sit, and watch.
Other: Cool Runnings - just a favorite from my childhood...dressed as a bob-sledder for Halloween one year and tried to get people to kiss a hard boiled egg while trick-or-treating.