[deathanatos]

Cmd+backtick only works if you're switching between windows of the same application; if you are, it works well. However, I find more often the case is that you're not. (In my case, it's usually between the terminal, the browser, and the editor, or some subset thereof.)

Cmd+Tab switches only between different apps, and brings to the foreground all windows of that app, even if only one is required, sometimes obscuring way more of the now-backgrounded window than desired.

I really miss having a key to switch to the next window in the Z-stack, ala Alt+Tab on Windows/Linux.