Maybe it is just me.
A not insignificant fraction of my scientific life is motivated by Creative Anger.
Another way to explain this state of mind is when you respond to some issue that arises with "No way, that is total bullshit....and here's why."
The "why" is where the creative process is engaged. It may be a marshaling of relevant literature. Perhaps to the level of writing a scientific argument down. Introduction to a paper, a discussion section...maybe even a whole review article. If you have it really bad, even a grant application.
Other "whys" may stimulate you to a new experiment or line of them. A lot of my creative anger responses seem to involve the discovery that no, nobody has published what are incredibly obvious studies. And clearly, "Clearly!", I say, these must needs be done.
And we're off....