it is so cool we get to make these choices....
I am sure most of us have hunted around for the master switch, the alternator, and many other "switches" that have been placed all over the panel (and under the seat too!) in certified and experimentals. I opted for toogle switches for the "mags" (one is electronic), and put all my ignition/battery/push button start switch in the upper left area of the panel, a place easy to see, but well out of the way for typical flight operations/landing/takeoff. At shut down I just hit all four switches (master, alternator, mags) to do the
down/off position (and yes, mag switch in the open position), and the plane is safe. Personally over the years, I have flown way to many aircraft with keyed mag switches that the index position gets loose and wrong, and/or the key can be pulled out while still in a "hot" position
. There is something about seeing and hitting a switch into the off position that hits the mark for me to know that I have put the plane's ignition system where it needs to be on the ground and in flight. But again, these are just personal thoughts and there are many really great ways to wire a RV-10.