Having strict rules for gallery submissions would probably be a bad idea and cause people to not submit their creations because the rules scare them away. But some basic guidelines are always welcome :)

And perhaps also have two main sections of the gallery where one contains images/screenshots selected by Michael himself. And another user submitted gallery where all users no matter their skill level can submit both highquality and beginner creations, screenshots from Moi and such things. Although this gallery need some cleaning up from time to time to keep out the stuff that shows nothing.

Ofcourse categories such as jewelrydesign, archviz, product viz and other big categories like that would be nice but having them would most likely require more time maintaining them by Michael which is valuable time he could spend elsewhere.

That's how i would set it up :)

/ Magnus