Being accused of occasionally adding a bit of bling to the ukes I build, I naturally find this discussion interesting. Like some others here, my tastes tend to fall into a wide spectrum. I can appreciate the exquisite workmanship of a Larry Robinson or Grit Laskin, but even that level of ornamentation is usually over the top for me. (Believe me, I do draw the line somewhere!) I am also attracted to the understated elegance of a more simply built instrument. Finding that happy middle ground is an important and sometimes difficult part of what I do. My toughest customer is the one who wants their uke to look like a circus wagon and I spend a lot of my time saying "no" to people.
But I think there's some confusion over the term "bling".
One of the criteria of a good instrument for me is that is one that is built cleanly, with impeccable joinery and no mistakes or flaws, no matter how simple it might be. Impeccable workmanship on it's own can be breath taking. I looked up the word "Bling" and it is (in part) "referring to flashy, ostentatious or elaborate …… and ornamented accessories ". Here are some things I don't consider bling on an ukulele; while they may be decorative, they are also highly functional.
I don't consider bindings to be bling. Since the are made of a harder wood (or composite) than the rest of the body, their intention is to protect the corners from accidental bumps and dents. I also fall into the camp of builders who believe that binding stiffens the ribs (sides) of the instrument, allowing for better projection and overall tone. I won't swear this is true but I've built them both ways and I'm convinced that my bound ukes have a better sound. Perhaps it's the notched kerfing used when binding that improves the tone…too many variables to make an absolute statement. But I'm sticking to that story.
Rosettes were originally designed to strengthen the sound hole, the weakest and most vulnerable part of the sound board. By adding a different, most often harder, material around the sound hole, the stresses are spread out more evenly and a crack is less likely to develop there.
Fret board bindings, while looking pretty classy, also covers and hides and covers the fret tangs, that part of the fret that hurts your fingers if you are unfortunate enough to have your fret board dry and shrink on you.
There may be others if I think about it.
On the matter of wood grain, it's much easier to build an instrument from wood who's grain is plain and simple. A builder really needs to know his/her craft to get the most out of highly figured grain. "Generally", it's usually more difficult to work with and not as responsive and there can be many issues to overcome when working with it, dealing with stiffness, strength, responsiveness, etc. An excellent ukulele can be built from highly figured wood, but wood with simple, even, parallel grain already has so much going for it it doesn't need to be coaxed to be anything more than it already is.
This post is much longer than I had hoped but it's a huge topic and like religion and politics, mostly subjective. Personally, I like art, I always have. It touches my soul in some way that is necessary for me. My life is enriched by having pleasing things to look at.
For me to feel comfortable about an uke it needs to be designed right, it must have good playability, it must be built well, it must last, it should be pleasing to look at and something you need to hold, and most importantly, it's got to sound great. It's got to have that sound (whatever "that" is) that moves you and makes you want to play as often as you can. It has to transport you. If an ukulele doesn't sound great, the builder hasn't done his/her job, no matter how attractive the uke might be.
This is my opinion only and the random ramblings of someone who's been sanding lacquer finishes since 5 am this morning……