I adore sports movies, and while it helps if it's a sport I follow (Rush and Senna being two of the latest offerings), I still love movies like Cool Runnings and Field of Dreams. There's something very engaging in the emotional ride.
As a Prost fan, I had a few issues with liberties taken in Senna so I prefer Rush (thought I know that took a little poetic license too) but I just love that scene in Cool Runnings, so I'll say that's my favourite.
I'm not a football fan (American football) but I love football movies. Any Given Sunday was awesome, so was the Blind Side. I also loved A League of Their Own, back in the day. Geena Davis, Lori Petty and Tom Hanks, how could you go wrong?