K I want to explain this a little better since I was the one who brought it up.
First, its important to clarify the dif kinds of people into the GW( im saying GW because to be honest this is the only mini company with this semi set of rules ) hobby ( I am somewhere in the middle for the record ), you have the pure gamers, these are the guys who dont give a crap and show up with 3 colors on a fully painted army and who just play for the tactical power gaming aspects, then you have the enthusiasts, these are the people who both play and enjoy the modeling and painting aspect as well as the backgrounds etc of the GW world of games, lastly you have the pure modeling people, who are not gamers they simply collect the models to paint and convert and enjoy, im going to say flat out that there is nothing wrong with any of these kinds of people, but it is important to note these kinds of inviduals compared to alot of other mini game companies who tend...to not have the same kinds of ideals or rich history for the part im about to explain.
Fluff: this is the sorta background and \"official\" stuff on each army that GW has created, if you have played the games or read the books ( 40k as an example ) then you would know that say...the ultramarines follow an extreme and strict \"codex\" color scheme for their troops, its far more then color though it also deals with command structure etc, also you could say take the empire from warhammer, each \"state\" of the empire has a color scheme that their troops wear, take nuln who is a blackpowder industry and those colores are black with a bleach bone inlay ( in the poofy sleeved areas and colar etc ), however there is variety with it too, as you can create banners with dif colors and use these on their plumes or whatnot.
Now you dont have to 100% follow these kinds of things, but that said...when I decided to make a serious army for 40k ( and after spending a few hundred $ ) I wanted to really take the time out and give the army as much detail both paint job wise and pose, fluff etc as I could.
This included me buying index astartes III for the World Eater background, color schemes etc, also in theme with Khorne was to give each WE a chain axe and to make the squads 8 men ( 8 being khornes \"magical\" # which also grants game stats ), now you dont have to go this far but if you play wh/40k and take as much time to paint and collect your army then its not hard to figure out why some of us like to do these extra steps, its what we call a \"themed army\" and some of us really enjoy this part of the hobby.
There is nothing wrong with painting models to some of the godly standards that are on here or branching away from the standard \"official\" color schemes, however I was pointing out that looking through this whole site I have yet to see a single \"official\" style painted World Eater, and I would love to, Im working on painting mine up in that style as we speak but I am not a master painter or GD standard painter like so many of the people on here.