My mom was born in Ditmas Park in Brooklyn, and later moved 17 blocks from Ebbets Field. She grew up watching Roy Campanella, Gil Hodges, and yes, even Jackie Robinson. She split her childhood between Brooklyn and Mexico City, but to this day, she still identifies as being from Brooklyn. The Dodgers were central to that identity; after the team left for Los Angeles, she basically stopped following baseball, and really, all sports.
I grew up in a small Ohio town -- Granville, to be exact. Growing up, I became an Indians fan, a Cavs fan -- and yes, a Browns fan.