Oi. I wish the nice designers of Silicon Valley could give some "pull requests" easily to the KDE team. The design is such a mix of things that don't go together -- some places of translucency, others don't, the pop ups are mostly flat yet the calculator has shadows, the search results and bookmarks have borders on every row yet the launch menu doesn't, the spacing between items in the left side of dolphin is off (too close), the icons are seemingly all over the place (the life preserver is more photo realistic while the hard drive is more cartoony), etc.
I know there are mailing lists and whatnot for this but if the process of helping was easier for normal (and good) designers to help out a little I think we all would benefit. Or at least if you're going to copy Apple pay attention to their ratios.