I notice electrical outlets, sockets, and plugs a lot. It is difficult to explain why -- they're just something I've always tended to look at and think, "Oh, how neat." I figure it's probably just one of those things, like how some people get really fascinated by trains or stamps or model cars.
In any case, I was at the hardware store earlier today and I had my camera with me, so I took some socket pictures. There really are a fascinating array of shapes, sizes, colors, and current capacities -- not to mention the number of adapters available for different situations.
I don't travel much, and have actually never been out of the United States, but if I did travel you can bet I'd have the camera ready to start the international section of my outlet image collection. =D