Off-topic, but I just recognised the card in your sig, overseer
But yeah, concerning Horus Heresy, I can't wait until I get to whichever one of the books has an Ultramarine and a World Eater on the same ship. I was grabbed when my stepdad gave me an excerpt along the lines of the World Eater, sat at the table where battleplans are being discussed and "twitching with bloodlust". Which reminds me, I really should be reading more of the books than I am at the moment.