shoe sketche album

I posted some drawings on the link
http://www.picturetrail.com/gallery/view?p=999&gid=9951325&uid=4799514&members=1

what about creation and shoe design?
how much creation is nessecery to have a good design? and where?

I like the pull up shoe designed for sun or rain. I would love to see more sketches on that concept. What does it actually look like?

What things are you looking for feedback on?