Hehe, yeah, it's easier to rip a Schuko socket w/ box out of the wall trying to pull out a plug than having a Schuko plug fall out of the receptacle...

Still, even though they're more or less illegal by now I like the old round ungrounded sockets. They simply look good.

Maybe I'm just a bit backwards... recently I did some retro-wiring using asphalted cardboard conduit, metal boxes, cloth-covered wires and some cable with black-grey-red color coding. Big room, 5 Schuko sockets 2 old-fashioned ones next to the door and 3 modern ones in hidden places), 6 ungrounded ones (2 of them triples on each side of the window), toggle and rotary switches, some switches and sockets with real glass face plates. Pictures follow as the film is developed.
You get _really_ black sticky hands trying to make joints by twisting the wires and taping them with old cloth tape! Now I know why choc blocks were invented...