Every day, because i enjoy it.
Daily head shave, and it is genuinely something I look forward to. Nothing better than a freshly scraped dome.
Always amazed @Snuff , your ability to straight razor your head twice daily is impressive.
1 ATG pass each day does the trick.
I only shave my face once or twice per week, and I only do a single WTG pass with a Feather DX.