With my FullHD monitor I use application bar fixed to right. That way I have good overview of other applications and their switching is easy. Sometimes I use applications that need lot of space (Photoshop for example).
I know I can temporarily switch application bar to slide away, but that is not very convenient. I am looking for program that on hotkey either switches between virtual desktops, or (preferably) turns active application to full screen mode (similar to medial players, overlaying anything on screen).