make groups.
user-generated content.
(when games come out) sort games by likes to dislikes, color, and genre (colors would be the game's difficulty).
and last but not least. special forums. the special forums would be like a pay-to-get feature but there would be mystery topics everytime you go on the fourms.

Groups have already been suggested a million times, they're coming.

User generated content? I don't get it this entire site is user generated content.

As for special forums I don't quite understand can you elaborate? Random forum posts require that you pay to view them? With the quality of most of the posts on here I wouldn't pay a single cube to see any of them lol.