Now, in the 40k fiction, they're all empty, mindless suits of armor with the dust of their vaporized owners swirling about inside, led by a few powerful sorcerors. I've always found the idea of 30k Thousand Sons to be super interesting, and now anyone can build them up!
Which makes me want to buy an upgrade kit and do a Taetorial for them using the Betrayal at Calth figures as foundation. Who's with me???