https://en.wikipedia.org/wiki/Schuko
I've used many plugs and in my opinion, the schuko plug is the one that makes the most sense.
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Reverse Polarity (can't use it the wrong way, and you can turn it in case some power adapted is in the way)
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also the symmetry makes it look more pleasing
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only 2 pins stick out (the ground is in the body, 2 pins are a reduced area of failure in case you drop it.
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very good and secure fit