Just a quick note to say that although I don't post as much as I used to (due to work commitments, and more), I would be very sad to see you close down!
I came for the limericks, but stayed for the Clerihews. MC5 has a nice comfy feel for me. I like that it's not intimidatingly big. I don't much care for mcios or Orange. I think kill votes or timers would be a nice addition. If the games rotated more swiftly, us newcomers wouldn't feel as shy about trying to create them. *shy shy*
As befits my profession, I shall have to do some statistical analysis on the corpus available to me to see if it's possible to devise a heuristic that identifies the 'running out of steam' point.