The Signs As Bedroom Themes!:

Aries: Everything is dark and black

Taurus: There isn't a theme, it's just a mess

Gemini: Tried to be cool but there's actually fandom posters everywhere! Sorry!

Cancer: Posters of their favourite bands and singers, the room is kept neat and they never seem to have dirty laundry somehow

Leo: Light pink, has Christmas lights like all those Tumblr rooms

Virgo: Pastel colors

Libra: Messy except they have a TV and a laptop that they're always on and there's a tiny clear space by those.

Scorpio: Neat room with space and galaxy stuff, like the bedspread

Sagittarius: Hangs pictures of their friends everywhere

Capricorn: Everything is white and clean

Aquarius: Blue

Pisces: Underwater, beach, fishes

I am basically a Scorpio and I wish I had that theme but I always imagine I am in space so *shrugs* xD