You have "it"
So, let´s start with the bad: your animation (the movement ) isn´t too good. It looks rough. But it isn´t worse than the average animation, wich leads me to the good:
Your extremely accurate selection of music, the smooth blend of colors, and those melancholic, but fresh (fresh like rain) stories create such an atmosphere, such a armonic atmosphere, that when i see the average animation, it brakes it down for me. Shutters the illusion.
You are one step away from excellence. You have a good instinct for colors, you know they mean something. You know that everything you hear also means something, and that music has a texture of its own. You know how to create ambient with the right combinations of colors, music, and moments (wich is directing).
My only advise to you, besides "keep doing great flash" is work on your animation (Oh, and try drawing better, your last flash had problems in the character´s proportions, and that also broke the illusion). Try watching Eric Drobile, he´s the best animaiton-wise.
Hope I´m helpful, thanks for that great quiet moment while watching your work.