I admit it, I have trouble letting go of a story. My inclination is to revise, revise, revise. And then revise some more. Even after a story's published, I want to tweak it here and there. But at some point, I know, it's better to cut 'em loose. :)
Still, a little hindsight's always a good thing. Which is why I like receiving suggestions from pubs after I submit. This past week I received a "good" rejection - it included notes on specific areas the editor asked me to punch up or make more clear. After a forehead slap, and me telling myself I should have thought of these things earlier, I made the revisions and like the story much better now. I have wonderful crit partners but really appreciate an editor's insight.
So, after resubmitting, now I wait again, but with much more confidence in the story. Fingers crossed! It never hurts. :)