Earlier quoted context omitted.
The hardest thing to me about ditching Mac would be that Apple is the only company capable of doing a user interface. ALL other user interfaces by ALL other vendors suck. For some reason, no human beings on the entire planet other than those that work at One Infinite Loop in Cupertino are capable of doing a UI.
I can't stand the Mac UI. In every way that it's better than Windows, there's some way that it's worse. The dock is a terrible interface element and having a menu at top the of screen may have made sense when screens where 512×342 pixels but makes little sense with giant resolution screens and multiple monitors. I'd say the all user interfaces from all vendors suck, including Apple.
Essentially, the menu items are infinitely tall hit targets… no matter how fast the mouse moves towards them, one can never overshoot them vertically. Menus in Windows and most *nix environments require both horizontal and vertical precision.
Furthermore, why are you bothering with the Dock when Exposé and Spotlight (or Quicksilver, Launchbar, etc.) offer great power user alternatives?
Personally, I still can’t stand how Windows and Linux make no distinction between applications and windows.