[JRandomFreeper]

Yes, it very much depends on what you are doing with the edge. For 8 hour shifts of prepping veg/meat in commercial establishments, 21.5 degree angle works well for me. My machete that I use to clear brush gets a more robust and longer wearing angle.

/johnny

[buffaloguy]

Exactly. I also sharpen any tool that has a blade, like a shovel.