Since this forum is part of a network of many other forums, I think that a global registration system would work well here.
If I want to go to Contractor Talk or Electrician Talk or How To forum I need to register at all of them. It's not just registration, it's avatar, signature, and all the other settings that need to be made. And then when something needs to be changed, it has to be changed at each and every forum.
Having a Global Registration would be a nice feature for the network of forums.
Anything fun is either illegal, immoral, or fattening.