I am a geek and I like Unity. It's like emacs of the world of UI's. The first modern GUI you don't need to use a mouse to work with it. I find it very productive.
You can launch or switch to any of the first 10 applications on the launcher, resize/maximize/minimize a window, tile multiple windows, switch workspaces, or bring up the dash with a single keybinding for each. The only one of those I remember being able to do in GNOME 2 was switch workspaces.
