We know this because he said a perhaps-not-entirely-one-hundred-percent-serious complementary thing about my strategic sense once. And dang straight but I milked it for all it was worth:
You can’t buy that kind of quirky, ‘not really an endorsement but I’ll take it’ quote. Heck, I’d send him a copy of my latest novel if I thought he’d be interested in science fiction cosmic horror. (If he is: drop me a line, Eduard.)
Heck, if he’s into 40K, I don’t see why he wouldn’t like your stuff.
With this level of support, I would tell Games Workshop that writing him into one of their games is a way to make more money.
You have received an accolade from a scion of an imperial house whose lineage reaches back a thousand years?
I admit it, I am green with envy.