It's ironic that because Linux is still harder to install on laptops than on desktops, people often end up using an OS X laptop and a Linux desktop. The drastically smaller screen space of a laptop makes it so much more important to be able to choose the perfect window manager for your tastes and configure it for maximum productivity. Also, the inferiority of laptop pointing devices compared to using a mouse shifts the balance towards using the keyboard for many common tasks, which once again favors a highly configurable window manager. OS X is trying to make up for it with multitouch swipes and Mission Control, but it isn't configurable enough, and probably never will be. As a result, working inside a small screen is a bigger tax on my productivity under OS X than it was under Linux.

Granted, I only ever used my Linux laptop for programming and light web usage. I never tried to set it up for anything else, but it was perfect for that one purpose.