Writes non-stop but doesn't share it with anyone:

LEO, AQUARIUS, CANCER

Writes like 3 chapters then gives up:

SCORPIO, VIRGO

Writes like 10 books in 3 days:

PISCES, SAGITTARIUS, GEMINI  (this is so so true!)**

In a constant state of writer's block:

ARIES, TAURUS

Always have a good plot in their head but too lazy to write it:

LIBRA, CAPRICORN

**ask @Kolazome I'm always bouncing ideas off this person.