...freak.
My favorite type of control is Black control.  Now, I like Black/Blue control, thanks to Invasion and Planeshift.
I believe that the easiest ways to "control" an opponent is by discard:  Unmask, Duress, Stupor, Ravenous Rats...etc.  Most other control types are over-costed, or dependant on your opponent, like countermagic.  Discard is specail, because it's active (unlike countermagic which is reactive) AND controlish, both at the same time.  I must say, discard also comes in cheap ways:  Unmask, Duress, Stupor...
...all that, plus the fact that it plays mind games with the opponent.
I love Black.  I love control.  I'm coming to liking Blue.