UK are safest, EU are both practical and almost as safe (as it supports a variety of plugs, both with and without grounding), and US is complete and utter garbage built for garbage voltage. Plus, the US one looks scared.
Try going to Japan. They took the US design, but most outlets there don't have the grounding plug (in hotels it was practically non-existent). My travel adapter didn't even work xP
It’s the same in The Philippines. One place I stayed had a three-way splitter & I snuck my laptop charger in the top, just letting the ground hang out. Luckily my gears has gotten lighter & with GaN chargers, two-prong is just fine.
At least the UK one is blunt. I'm trying, without success, to find a picture of the old style telephone (and my modem) connectors we had here in Norway. Imagine the UK power plug, but the pins are pointy. I've drawn blood stepping on these. I would run a marathon on Lego to avoid stepping on one of those again. Luckily they were gradually replaced by wallmounted RJ11 (or RJ45 if you had ISDN) during the 90's.
I've seen an Australian guy bend an American plug enough so that it fits into his outlet. Let's just say that his house burned down his studio lights started flickering.