Reminded me of Warcraft (the first), where, if you kept clicking on the same unit they would respond in more annoyed ways. The best IMHO was the human soldier[1], which would end with "Why do you keep touching me?".
First game that I knew of which had such fun details like that.
I don't know how is in English, but in Spanish if you keep clicking the Demon Hunter it says "I'm blind, not deaf". That was my favorite one.
I think I prefer the extra quotes from Warcraft II and Starcraft. The latter has some fun references to the Alien franchise and even a callback to Diablo (Protoss probe)
I think in WC3, if you clicked certain critters enough, they would explode.
"Join the Army", they said...
I remember one of the Orcs in Warcraft II would yell "Stop poking me!"
They had the same joke in the sound setup program. If you kept clicking "test sound", you would get "it doesn't get any better than this!" in that same annoyed footman voice. But my favourite was the orc destroyer in Warcraft II, which would start singing sea shanties. Or at least attempt to.