Don't we do both?
Not sure what you mean John.
Customized my space pages is a different niche than skinning. Those pages get seen by anyone that visits and isn't only to please themselves. They want to impress others as well.
Where as skinning like we do, not many people see our desktops. It's more personal. I don't setup my desktop to please others.
If you have guests over all the time, you'll care about keeping the place in check. If you never have guests your attitude towards cleaning changes (unless your felix unger).
Of course a family situation is different but I can only speak of my situation. Sometimes the cat is more impressed with my desktop than my wife is.