Personally, I prefer corners (though behind walls does work well.) It's easy to watch people interact, but I can still plug in my headphones if I need a break and not worry about anybody sneaking up on me. Failing that, at home. Though, that's just me. I'm sure others have other places they like.
I/J > T > n > s > f > e/p
“Sometimes I'm confused by what I think is really obvious. But what I think is really obvious obviously isn't obvious..." - Michael Stipe