Yes
Probably not
No
It does play a part in the overall sound, but only part.
Yes I do like decorative timbers, and yes, I also like a more simple aesthetic.
I like the grain to be visible, I like flaws, it is a natural product after all. A decorative grain is wonderful, but in some cases, it's overdone and over the top IMO. Some instruments look more like coffee tables than instruments. A nice flame or a burl is a wonderful thing, but can be a bit "visual overload" if too decorative a piece is used. If a piece is subtly figured, IMO, it's a bit more interesting to look at.
The big question here though, is how can these figured timbers be produced in a sustainable manner? Can they be "farmed", or does their figuring depend on them growing outside of a managed plantation?