Try looking at something white and/or has a combination of the primary colours (red/green/blue) at 2-5 in the morning without getting watery eyes from the burning pain.
That's the big reason i chosen one with mostly "dead" colors.
Formatted my computer around a month ago, only bothered installing what i really needed (browsers, music player and multimonitor software...) Soon gonna add some stuff...
Icons And Wall (Edit : and visual style) both from deviant art. I can link em if you guys want...