Our operating systems of choice may (or may not) have beautiful user interfaces, but it's rare to find a Lifehacker reader without at least a little customisation. Whatever it may be, what customisations and GUI hacks can't you live without?
For me, I need to change my OS X dock. I can live with forcing the 2D style, but the shiny mirror OS X comes with is a bit much for me. My personal preference? The Niqu Dock. Also, the Flurry icon set is a must. How about you? Share yours in the comments.