Beauty is indeed in the eye of the beholder.
But there are some universal truths.
When anerythristic Hondurans came onto the market, I thought "those things look like a snake in a jar of formaldehyde." Meaning that the bright orange and black snakes were devoid of one of their best features: orange. Therein lies one "truth" - rarity. If it's the only one, people will like it, because those that have been breeding snakes have never seen anything like it, and they appreciate that something new has been created via selective breeding.
Another "truth" is color. Breeders shoot for jet black rather than dark brown, bright white rather than off white, yellow rather than cream. One of the goals of selective breeding is the refinement of color. The more "extreme" (think Harold & Kumer Go to White Castle) the color, the better. Solid color is better than a mix of bits of color.
In addition to this, there's pattern. Uniformity is key here. A clean, evenly striped corn will find more fans that unevenly striped or broken-striped examples. The same could be said for zigzag and banded corns.
So these are three keys for breeders strive to produce to "one up" each other: rarity, color and pattern.
I myself am working on patternless corns. They are derived from striped corns and babies with the least amount of striping are "held back" to continue the selective breeding project. So far almost all these snakes have some striping on their neck. What would make one of these of higher "quality" than another is the lack of striping.
You mentioned Okeetees: With reverse, the width of the white borders outlining the blotches make the snake of higher "quality." The same is often true with the standard Okeetee phase. But with both snakes, having solid, bright blotches on a solid, bright background color are important as well.
Corns snakes that have visual impact are what people at shows stop and stare at.
T

Third Eye