Most Helpful Guy
I think full length stockings/tights look best with super short skirts or minidresses that would otherwise be risqué. I don't think they're really a bedroom thing, though, because they don't look good by themselves.
Thigh-highs are great if a girl knows how to style them. Bottoms shorter than the top of the stocking make her look like a hooker, but thigh-highs with a knee-high skirt (with the occasional discrete, playful thigh flash) is incredibly sexy. Thigh-highs also look great by themselves, so they're much better in intimate settings than full length stockings.1
Most Helpful Girl
I occasionally wear stockings like the ones in the picture, and my boyfriend thinks they're very sexy.2