The same thing happens to me everytime I paint. I have an idea, I go to express it and it ends up as something different that other people like but is not what I envisioned. So I always end up with a picture but not the one I had in my mind...it is as if it is a poor replicate of what I had thought of. I think that the definition of the Master artist in any venue is the one who can actually produce the exact vision that he/she has. Weither or not it satisfies anyone else means nothing. I believe that creative expression is about satisfying yourself foremost and always.

Perhaps you like the original because it comes closest to what you envisioned...sometimes you just have to accept it as that and move on. Chances are pretty good that with some time, the vision will become clearer and the thoughts will metamorphisize(sp)
Art in any form is just thought that takes up space.