The most typical is the Yankees fan, many only like the Yankees due to success, however there are the few who were brought up that way.
Dodgers Fan:"Bandwagon asshole. The Dodgers have been in the playoffs almost every year and had no success, the Phillies get good out of nowhere and win the World Series."
P Fan:"Go bitch with the Mets Fan"
Mets Fan:"Haven't you put me through enough dick?"