Another vote for lawn here - there is plenty around that isn't as expensive as Liberty, and some of it is nearly as nice!
Cotton lawn isn't usually see through, although possible some colours would be if you were standing against the light...
Viscose wriggles when it's under the machine foot. It tries to pull or slip away and it stretches easily on any line that isn't straight grain. It is nice to wear, though, and lovely to iron.