Microsoft Windows 8 UI … hurts the eyes.
Explorer toolbar in Windows 8 – cluttered, complex and hard to look at. Hundreds of millions of Windows8 users will have to suffer this UI.
The full Explorer looks better but is burdened with the above toolbar UI.
And, lastly the Metro UI which is said to be “modern” but with its colors, organization, panels resembles a patchwork quilt, another poorly done UI.