I vote for The Starless Kingdom. It is a quite an adventure, a well written and complete story in limited words, I didn't feel anything was missing besides cutting some corners. The transition from a havoc creating nuiscance, loathed by the staff to a friendly rescuer and love interest was a bit sudden, but for the length of the story it worked. 

As for the other stories:
The royal life is a sweet but short romantic story. I would have loved to read more of the story and not keep me hanging on that cliff hanger. ^_^ The characters are very diverse and interesting to read how they look.
It is a downside that the entire story it started with Crystal, Crystal, The king, Crystal, Crystal, She, Crystal, Ember. A little variation in starting the senteces would improve the story.

King Sebastian is a well written story, the two scenes are detailed and read easy. I would have loved to learn more about King Sebastian, about what was going on, what happened in the 23 years, tie the two scenes a bit more together. There are a lot questions to be answered.