One note about subjective analysis of your own work: you are, inevitably, the worst critic of your own work. If something seems "too long", it's probably not long enough. Too "bright"? Try increasing the bright-ish controls. And so on.

Never second-guess in the lesser direction in what you create unless something's GLARINGLY wrong. Otherwise, just push the HELL out of that envelope...go as far as you can. This is how you discover what you're creatively capable of...and how what you create becomes clearly yours. And you're far less likely to be pegged for "lifting" someone else's style.