Following on from the avatar size discussion, some ideas came up to enhance users' profile pages...
Maybe a profile picture. Could be a huge version of your avatar, if you chose.
Or maybe a full post, so you could use all the bbcode to format stuff. Could be like a mega-signature, if you chose, and avoid having to squash lots of info into your normal sig.
Another crazy thought I just had - how about having bookmarks that are stored on the forum? Maybe with a option to make some/all of them public so other users can see your interests. In any case, there could be lots of advantages over saving bookmarks in your browser, such as being able to see more than just the title of the post when you look through them (i.e. author, reply number, date, etc).
What might people want? What's potentially achievable?