I finished Angron up the other day. I've had him for a few months, and he sat assembled and primed on my desk for a long time. I was honestly a bit intimidated to paint him, as he is my first Forge World model and is highly detailed.
I changed a few details from the Forge World paint job. First off, I used more reds overall, especially in the shoulder pads, and actually painted in the planets on the World Eaters emblem rather than leave them plain brass.
I still have the larger display base to paint at some point. For now, Angron will be pulling duty as a counts as Lysander for a doubles tournament I'm playing in next month. He'll collect a few skulls for a nice Skull Throne of his own.