I think that it would be much more fun to be able to interact with various users on here. Sometimes someone follows me and I check out their profiles and I am curious to talk with them. Get their opinions on various movies and such.
A shoutbox, like on last.fm, could be a fun way. Being able to post on their “wall” so to speak. If spam is an issue, have a captcha or make it so only VIP members can write first (but answers to that “shout” can be made even if the user is non-vip).
Currently a profile is just stats, stats and more stats. This would complement that.