Originally Posted by ivolt

I have to say the tau in dark crusade (err RTS). They scream about everything. I don't mean like a manly roar, more like they are all dying horrible, painful deaths. They will get shot from some weak guy and scream "ARMAGEDON!".

"Aaah, my spleen!"
"Crush, kill, haa haa, destroy!"
"Grant us the gift of the chaos gods, great one!" 
"DO YOU HEAR THE VOICES TOO?!"
"I feel the warp overtaking me... it is a good pain!"
"Sanity is for the weak!"
"It is as though a thousand mouths cry out in pain."
"Enemies! We need enemies!"
"Maim, kill, burn! MAIM, KILL, BURN!"
"Rend them in half!"
"I feel the maw of despair swallowing me!"
I am not your bootlick!"
"Blood, blood, blood, blood!"
"I drink their blood from their hearts!"
"Split them open!"
"Uuuaaarrarraaargh!"
"Kill! KILL!"
"For the slaughter!"
"Why aren't we killing yet!?"
"I will shatter their souls!"

And my personal favorite:

"Hwee haf captoored eet foar KAYOSS!"