pls...keep it simple and don't get all monica geller about it
imo too many rules are unnecessary most of the time, they can be hard to follow and limit creativity, and they reek of anal retentiveness. not qualities i want when entering a contest for fun
and let's be honest, i love RO but these are contests for temporary loading screens and cosmetic hats usually. not cash or scholarships or small islands, a majority of these don't even affect permanent ingame content. if a contest doesn't run optimally i think everything will still be ok
the stuff currently in the OP is mostly alright and common sense (your entry should be your own work) but i wouldn't go too far beyond that. category slots are...okay, but still wouldn't eliminate jealousy or complaining, no amount of rules or categorization ever will. i think the community already does a pretty good job of coming up with inclusive, creative contests where pure illustrative skill isn't necessary to win. i'd like to see more of these than stricter rules!