Football: Dallas Cowboys
My mom is a diehard Skins fan but I was 5 when I was like look I'm sick of seeing my mom in all of this Indian garb, pig nose, Redskins show laces, etc, etc so I said I would pick the Redskins arch rival and that would be my favorite team
NBA: LA Lakers
I was a big fan of Magic Johnson and Showtime so they became my favorite team instantly around the same time I became a Cowboys fan.