Like the Muses, they are attracted to talent and promising projects, and the presence of several at once probably means you are on to something big. Still, they can frustrate or even destroy the most inspired tender new poem, and send the poet into despair, alcoholism, or flash fiction. The more we know about them, the better.
My favorites are Tripsichore (She of two left feet) and Hyperbole, goddess of blurbs. May they be far from me!