[cheat-master30]

Okay, first of all, since you asked for mod recommendations, my first recommendations are going to be extremely obvious... you need a gallery (Photopost or Photoplog or Coppermine or something) with forum integration and various categories for art to be uploaded to (which is excellent for a graphics forum). You should also use that mod which gives a list of user created albums made in vBulletin, and maybe a few mods for fun, which I have no idea about.

Secondly, the style looks pretty nice to me, so well done. It also looks very much professional and suiting to the topic.

You may however want to fix this forum description for the large picture forum:

Designs that are smaller larger than 500 x 500 pixels.

You do however have way too many forums for a new board. Maybe condense the not used gaming forums into only those that are being used now, and have a general gaming board to go with it instead? Many others are likely a bit un needed at the moment as well.

Next improvement I'd make would be to make some forums public, since people really do not like members only to view everything forums, and at the moment there is nothing for guests to see or for search engine spiders.

Also, put the CSS in an external file rather than the header of the document to save major bandwidth, since you'll need it with the detailed images your members are submitting and wasting tons of bandwidth on how the forum is styled rather than the images isn't the greatest idea.

On the positive however, the signature and avatar contest stuff is ideal for this kind of board, and it does seem like if the few things I mentioned are improved that the forum will do well.