There is definitely a standard. That's why some people would rather spend more money on a better example of a morph than one that isn't. If someone rather get a blushed out pastel than a bright yellow pastel with jet black blacks, then that's their opinion. That's they're personal choice. They will appeal to a much smaller group of individuals who prefer a blushed out pastel over a bright yellow one. I'm willing to bet that if you posted a poll of whether people liked bright yellows or insane blushing, the majority will vote for bright yellows. I see more people say they like high white sides on a spider than low white.