Take No Prisoners!

It's good strategy to use your forces to destroy the most immediate threat to your victory, but that's not what we're here to talk about today. In fact, we're not going to talk about sound strategy at all!
Today we're leaving good tactics completely by the wayside, and instead we'd like to chat about delicious, delicious vengeance instead. In particular, which unit do you just love to hate? When you load up a game of StarCraft II: Wings of Liberty, are you secretly hoping to smash a particular foe? What critter or vehicle do you go out of your way to exterminate, annihilate, and destroy?
We'd love to hear about your motive, too! Perhaps the shriek a zergling emits when you turn it into a fine, red mist brings joy to your heart. Maybe you get a morbid kick out of a reaper's final fireworks display. It could be that you feel vindictive pleasure from finally reducing those void rays to glowing shards.
So, what do you want to crush and why? Dish out the gory details in the comments!

And I just hate zerg period. Only zerg players I have ever played do the exact same thing. Rush lings, then lings and roaches, and then mass mutas. During this time they make Ultras (if they haven't won / lost already). Always the same in my bronze division.
I like killing all zerg because they are so squishy sounding.
Dark Templars piss me off and it pleases me to kill them as well.
Void ray proxy
mass MMs (vs terran?? LOL)
Baneling bust (not cheese but still fun to own)
Mass muta
All time hated unit has to be void rays though. *&(@ all voids and the person who thought of them!