UIs for this sort of thing are more often a negative value, "what do I not want in the UI". For example I don't really care that much about switch types or sizes or whatnot (although if pressed I'd say "mechanical switch on the body right where your thumb would be when you hold it"), but the one thing I never, ever, ever want to see again is those insane multi-model switches where you have to cycle between High, Medium High, Medium, Medium Rare, Well Done, Rare, Medium Low, Low, Strobe, Conga, Waltz, Macarena, SOS, Shave-and-a-Haircut, and Off every time you use it, which it seems like every one I pick up has to show how cool the designers are. High, Low (for long-duration use to save battery), and Off is all you need.