@Luchare

I tend to agree with Matrixworkz, if you think it will be useful for someone, post it. If you're really worried, try posting a promo shot for it on a site like Renderosity or Daz in the appropriate areas asking if there's any interest. This method along with the help of my alpha tester is how I gauge things personally.

@TheKeeper

Everyone makes mistakes at first with packaging etc, as you said, it takes time to learn all the tricks. I wouldn't be worried about your content being judged as inferior just for that. Anyone who does, is obviously conveniently forgetting their own beginner mistakes.

My personal opinion on making freebies in general, is make what you want and have fun doing it. If you're not getting a ton of comments saying "This sucks!" then why worry?