Barcelona!

  Barcelona is the BEST  team in the world.  Why, you ask(or, why you should punch me in the face)?  Because it has the most international team you will find.  Think about it.  Arsenal: mostly Frenchman, so they play with a French style.  Manchester United: almost all Englishmen.  Chelsea: pretty diverse line-up, but lack the sense of calmness in their game.  Barcelona: very diverse line-up, always calm with the ball.  They play with all different styles.  Also, when's the last time you've seen an Argentine play alongside a Cameroonian.

   Now you can punch me.