User blog comment:McGillicuddy/Interesting Season 11 Spoiler :D/@comment-26855072-20151015184019/@comment-26992577-20151015230828

Yes, they always take a human form, but why should they ? I mean, The Darkness is much older than any human, what benefits could a human form have for The Darkness ? Why has she stopped to spread in her smoke form after her release ? She could have just spread all over the universe, what's the point in taking a human appearance ? I think it's mainly for budget reasons. Simulating smoke is more expensive than just give her a human form.