Honestly, I don't mind the 'fur' dragons, if they can explain it by means, and the only means that I can think of that 'could' work is that of..
My mother/father was a Saris.
Then I can see how a dragon may get some fur, though I imagine that..
1) Breeding between the two may be difficult, because I don't think the Khutit and the Saris are compatible(I could be wrong though).
2) You still have some Istarian Dragon looks, just with a bit of fur tuffed somewhere along those scales.
However, most people don't do this..
and I think the only outlandish concept I have, though I went over it with some other roleplayers, was that of my Gem Dragon.
Who came from a floating island(those do exist), and the dragon eggs looks more like large crystals/gems. They themselves look like Istarian dragons expect for one minor difference, which is there scales tend to be a tad harder and they have a bit of a glisten to them.
That is like-- it!
So, I guess that is why I can't be to harsh.
But yeah-- sometimes a few ideas do cause me to go. O-o
However, I am just repeating myself, so I'll shut up now.