Right now on the forums, I have it configured so that each forum displays the sub-forums immediately beneath it in the forum structure under the description of the forum.  It looks something like this:
Forum Name
  Forum description
  Sub-Forums: Sub-Forum 1, Sub-Forum 2
  
Would you guys prefer it if I left it on, or changed it so that you had to enter the forum to see the sub-forums it contained.  Leaving the sub-forum display on the front page does tend to make things a bit easier, but it also causes some irritating design limitations.  I'll leave it up to you guys, though.  What would you prefer?