It would be awesome if PD had a paintchat room, it's always a great way to know new ppl and draw at the same time. There could be a pchat for paperdemon and one for the red curtain.
It would be nice to have the ability to use the oekaki in your profile, like a guestbook. If you have been on mangabullet I hope you know what I mean heh.
Another suggestion (or more like a help/complain)... change the date of birth-order when you sign up.
Usually you type YYMMDD or have a scroll of options. And I didn't pay enough attention to this when I signed up here... so know I am born June the 11th and not November the 6th.. and it seems I cannot change that. I got a bit confused when I saw the order of the dates when I signed up here, so yeah I typed my date of birth wrong (except my year of birth phew)