Twi'lek...asari...wait, this isn't about the hottest aliens?
ok, as much as I like Eldar and other mysterious precursor aliens, I'm with da Orks from Warhammer 40k. They just don't give an rats ass about the mysteries of creation, politics, art, culture, etc. They just fight. And when they can't find other races to kill they start to kill each other and have the time of their lives. They show GRIMDARK the finger.
"Orkses is never defeated in battle. If we win we win, if we die we die fighting so it don't count. If we runs for it we don't die neither, cos we can come back for annuver go, see!"
The Waaagh:"The occasion of a Waaagh is a cross between a mass migration, holy war, looting party and pub crawl, with a bit of genocide thrown in for good measure. Millions of battle-hungry Orks invade their target and stomp everything in their way flat. Just who is invaded is a matter of supreme indifference to the Waaagh. Battle is battle."
"The Orks are the pinnacle of creation. For them, the great struggle is won. They have evolved a society which knows no stress or angst. Who are we to judge them? We Eldar who have failed, or the Humans, on the road to ruin in their turn? And why? Because we sought answers to questions that an Ork wouldn't even bother to ask! We see a culture that is strong and despise it as crude."
-by Uthan the Perverse, a controversial Eldar philosopher