I think a better question would be what type of UO server people are down for:

Pre-cast?
Crushing Blow/Piercing Blow/Concussion Blow?
Reg/No-Reg?
700,800,900,1100,36000 skill cap?
250, 300, 500 stat cap?
Trash/Reward Systems?
Custom Crafting/Materials/Weapons?
Level system?

It's a completely different game with different combinations of these things.

What is it they say about silence being golden?