I actually really like how full-screen works in OS X, in principle, and on one monitor. It's nice, isolated, you can navigate quickly via keyboard (ctrl+left/right, alt-tab) or 3 finger swipe. But it all falls apart on multiple monitors. It's better on Mavericks, but still isn't quite right.

I do love the keyboard extensions brought into play with Windows 7 for positioning windows, windows+left/right to align to exactly half of the current window, keeping hitting right or left over and over again to keep moving across monitors. Windows+up toggle maximize. It's ridiculously quick and simple and you can go from a bunch of maximized apps to comparing two things side by side without ever leaving the keyboard.

I can do this on my mac as well, but I have to install a flaky extension of some sort to make it happen.