Oh I know that feeling, I've dipped my hand into writing a few science fiction short story's and excerpts of ideas I've had - and it's amazing how something can shift under your feet when you look at it the second time.
You think you've penned utter gold, and when you proofread it the next day you wonder if the person who wrote this was hitting the medicine cabinet too hard; or you realize what you thought you wrote has no resemblance to what you actually wrote, but it's actually better that way. It's a tricky thing, but playing with words is damn satisfying once you KNOW you've forged a mastery of wordsmithing.
I also know how much motivation it provides when someone enjoys your work enough that they can't offer any critiques (YOU WRITE GOOD).