Nobody Cares About You Or Your Site.
For so long time I had been encountering a situation that clients was always asking to "can you change the 1px line to 80% transparent?", "can you move the two objects closer like 2 pixels?" etc many more tiny changes. I believe it were all personal preference, who could judge that 80% transparent line would determine your CTR.
The truth is:
Nobody Cares About You Or Your Site. Really. What visitors care about is solving their problems. Now. Most people visit a website to solve one or more of these four problems: 1. They want/need information 2. They want/need to make a purchase / donation. 3. They want/need to be entertained. 4. They want/need to be part of a community.
Making your site/UI more beautiful is helping to solve use's problem. yes correct, only when you have done the job beforehand well.( the strategy/scope/structure/skeleton)