I am a developer and I stare at the screen for hours. Yotemite UI screwed me up. So I made the following changes : 1. Dark Theme 2. Remove transparency 3. cDock 3D Yotemite Theme I tried a lot of settings and these 3 changes have helped me a lot! Personally, I feel the OS is made for cartoon characters with the color and menubar icons. I hope they make it more professional with the next release.