The standard, boring toggle-style light switch (US). Inexpensive, standard, durable, easy to replace, and extremely easy to operate. Basically the polar opposite of the average phone/laptop/game console/etc. power switch.
I would agree, if they are installed the 'right' way (toggle down to close circuit, up to open) to match the rest of the world. It's extremely hard to toggle up with a full cup of hot beverage…
