Except for when I went for the Ruthless endings I always let Asterion have white fur since he explicitly tells you it's his preference (if you ask), and I never changed it (except when gold fur became an option in one playthrough because Asterion changed it himself). So I was wondering if anyone doesn't stick with white fur on a typical playthrough, and if not for what reason.

it helps to tell apart different runs you are doing if you assign different colors

I always let him have white fur since he mentions it's his preference and it was his natural color as well.
He looks good with it, and seems to be happy that way :D

White fur... allways white fur (Its hard to say no to such a simple request!). Mmmm but yep, i changed to the golden too and only back in the Ruthless way. Brown is default at the begining.. i'm sure i didn't ever let him brown

White fur every time <3

After him saying it was his natural colour, it is thus the only correct option. I did have spotted for a little while cause I absolutely love spotted cows cause they're what I grew up with. 

Also I like Greek myths. What's so funny is like 95% of minotaur depictions, even the ones based solely off the myth, always have brown or black fur despite the fact that the myth specifically says that the father bull was indeed white.
It's like the opposite of the biblically accurate angel meme. Yes some angels looks like that, but not all.  Asterion having white fur is myth accurate and I will never not be a tiny bit amused by that.