What we really need is a USB-C-style reversible plug with data and variable voltage where neutral and phase never reverse and earth is always there.
Lacking that, I vote for Type N because it's small, polarised, and the pins are halfway-insulated. I don't like that the frame is symmetrical, so in the dark, the only way to tell which way to plug in is to feel the pins and the holes, same as USB-A. I reject all that hurt to step on.