I love the 2nd set of function keys on the left, so I replicate those. I don't use F10 anyway so that is re-mapped to be my Windows key.
The upper F1-F12 is the same, F13 is the 2nd Escape (since most of us are accustomed to looking for it at upper left) and F14 is my Calculator.
F15-F19 have not been assigned yet, F20 = Print Screen, F21 = (audio) Pause, F22 = volume down, F23 = volume up, and F24 = Mute.
Arrows and cluster above it are ANSI-standard, with center arrow being a 2nd down (for consistency with "inverted T").
Numpad is ANSI-standard with the exception of upper left being Escape, as it was in the old days. There is no need for NumLock at all, so I eliminated it.