You specify "team," but
TOO BAD, I'm picking more than one!
College basketball: Stanford University
Why: Their students are deplorable and have taken over as the sole team that Sherri Coale, bless her, cannot beat (because Iowa State has lost this honor in recent history). On the men's side, the Lopez twins were bullies and thug-like in the tourney and I wished them a quick trip to the NBA second round... wish not granted
College football: University of Southern California
Why: Some call us the land thieves and the cheaters, but we've since reformed and USC has taken over as a recruit thief through cheating. There is no team I would like to beat more and it isn't just because of the game of which we do not speak, it's because I would love to be the example of how a clean program can win over a dirty one.
Pro football: Minnesota Vikings/Chicago Bears
Why: Years of Randy Moss has soured this Packer fan on the purple guys even though Moss has moved on and All Day has moved in. I cheer for AD to have good games, but to never beat the Pack. Da Bears are just a historic rival that need to stay in their place at the bottom of the conference. Cutting Mark Bradley and JD Runnels is also unforgiveable, as Tommie Harris has eluded to... speaking of, suspending Tommie is also unforgiveable. Boo Bears. Boo.
They are as overrated as the Packers with Favre, poor poor Brett.
NBA: Chicago Bulls
Why: After years of watching them win over and over again and embarrass my favorite team the Bucks en route to 70-plus (Milwaukee was win No. 70 that year), I enjoy watching Chi-town suffer, much like I'm sure Celtic hated loved to see them lose a lot for years. Pistons are a close second for conference ties and some thugging in the 80s.
National team: China
Why: The women's soccer team was so endearing under Mia Hamm et all, but China nearly ended the dream World Cup run. Women's gymnastics had a wonderful showing this past Olympics, but was constantly dogged by biased reffing (ok, I'm a little biased too) and had to compete with girls who likely were too young to compete (and yes, that is a hardship in women's gymnsatics). The anti-commie comes out in all of us Americans when our national sports nemesis wears red (either China or Russia).