Potential and Kinetic Energy

Sparks of creativity come and go from day to day.  The magnitude of creativity I feel or generate on a given day can determine my mood.  Days where my creative cap just doesn't seem to be on my head quite right will go by dully and sluggishly.  These days come especially after completely finishing and feeling satisfied with a song or work.  All of my pent-up creativity is at its climax during the finishing process of a song.  Once the song is done, I am forced to dump all of that song-specific creativity out of, what feels like, a whirring city of a head.  What follows is a ghost town of a head.  My creative fuel pump shuts off, and I am forced to start all over again with no momentum. 

There are also days when there doesn't seem to be an end to my ideas, I lose track of them all.  What a wonderful problem to have, or a horrible problem depending on how you look at it.  With so many ideas, all scattered, some related to each other, others not, it becomes a challenge to channel this creativity into a finished project.  During these days, I'll have at least a dozen separate beginnings or themes of projects, but no clue how to progress with them, or no patience to stay with one specific project, knowing I have scores of other ideas at the ready for other projects.  During these days, frustration builds from the lack of accomplishment despite the potential.

Which trait is more desirable in this case: creativity or discipline?