I know I'm being "that guy", but I've never personally had a problem with Linux's power management or graphics. And I really like my tiling window managers and free software stack. I understand that some people have, but usually it's the fault of proprietary drivers and not Linux (and I don't purchase machines that require proprietary drivers to use).
But again, whatever floats your boat. I've personally started playing OpenMW (a free software implementation of "The Elder Scrolls III: Morrowind" engine) which works excellently under GNU/Linux.