This is Fancy.
Here are a few definitions for "fancy"...they all fit.
1. imagination or fantasy, esp. as exercised in a capricious manner.
2. artistic ability of creating unreal or whimsical imagery, detail, etc., as in poetry or drawing.
3. a mental image or conception: He had happy fancies of being an actor.
4. idea or opinion with little foundation; illusion: Her belief she can sing is a mere fancy.
5. a whim; vagary: It was his fancy to fly to France for dinner.
6. capricious inclination; a liking: to take a fancy to walking barefoot in the streets.