Legwear in the range of 15 denier or so is considered sheer ("pantyhose"). Above 30 denier, the legwear begins to be considered opaque ("tights"). What's your favorite denier?

Bare legs

Quite possibly heretical among some within the stockings/tights fandom, but oh well.

*lickety-lick*

Considerably transparent. At this level, they are pantyhose.

Pantyhose

Tights

At 30 denier or above, they are tights. Right around here seems to be the level that gets the most attention from the boys... (*pant pant*)

The fabric continues to get darker and the transparency begins to vanish. Preferences tend to split at this point.

The fabric is all but completely black and opaque. This level comes in handy for cold weather.