World Eater Heresy style
The World Eaters, originally known as the War Hounds, were the XII Legion of the original twenty Space Marine Legions, created by the Emperor at the dawn of the Imperium. They were among the first Legions to turn to Chaos in the Horus Heresy.
As the hour of the Horus Heresy grew near, Horus had little problem with corrupting the bitter and unhappy Angron. The World Eaters were probably the first Legion to join the Sons of Horus in their revolt and would be instrumental in the battles of Isstvan III, Isstvan V, Nuceria, and the Siege of Terra itself. World Eaters led the assault on the walls of the Imperial Palace and it is said that one of their champions, Khârn, was the first to enter the breach. (from Lexikanum.com)
As with most Chaos Legions I only started to like them while reading the Horus Heresy Novels. The brutes of 40K are not my thing, the savage but noble warriors of 30K who followed their hyper- aggressive Primarch Angron no matter what are more to my liking.
The awesome Forge World model of Angron tempted me even more. For Angron I tried a look of a truly aggressive warrior who did not care at all about his armour or appearance. So old school metal effects, some rust and a slightly dirty look.
The Assault Marine is a FW MkII model with an axe from Anvil Industries, I simply like their axes more.