1. It's nice to be able to talk to people who are like you in terms of interest and hobbies, etc. I really like participating in RPs, too.
2. Deleting posts that you made would be great and you should be able to click on a name when you receive a friend request so you can see if you actually know them. Also, private threads would be useful as they wouldn't take up space on the main page and people wouldn't be able to crash, but they would have to be more monitoring to avoid talking behind backs and such... Oh, I just thought of something else - I think we should get express notice when something is going to be changed, cleared, added, etc.
Oooh, I just thought of another thing. It would be cool if the threads could be like, color or symbol coded based on if they're RPs, stories, chat threads or other, and I just thought of something else (what is wrong with me?). It would be nice to have a way to flag a thread so that if it's something you want to remember to check in on, you can see it flagged when you're scrolling through, if that makes sense.
(Some of these ideas seem good to me now, but might seem terrible later, so feel free to ignore them if you think they're bad)