Easy or difficult?

I've written stories that flowed from my fingertips and only needed minor tweaking.  (This happens rarely, btw.)
I've written stories that changed about 95% from first draft to last.
I've had endings change 180 degrees.
I've put aside stories in frustration, only to come back to them years later and find "the solution."
I've searched in vain for beginnings.
I've given up on some stories, decided they were hopeless, and later revised and sold them.

Which is a better story--the one that pours out in a f