Boston Red Sox - This team always had a loyal following, but the post 2004 Red Sox fans are different than the pre-2004 Red Sox fans - they are incredibly annoying, classless, loud and arrogant. Add to it they have the second largest payroll in the MLB and you basically have turned the Boston Red Sox into the New York Yankees.
Yankees - Highest payroll barnone for the past decade or so, fans and management cry for World Series every year.
Dallas Cowboys - Thugs and tough guys, cheap shots, criminal arrests, shit talking - until they step on the field, lose, and cry like bitches. Fans act like thugs and tough guys, talk plenty of shit, then the team steps on the field, loses, and they cry like bitches.
San Antonio Spurs - Without Tim Duncun they would be mediocre, cheap shoted their way to the NBA championships last year.
I guess, as mentioned earlier, a lot of it has to do with the borderline gay and obnoxious following of each teams fans more than the team itself.