This is all hypothetical and for fun:
If you could pay extra for a custom server rule, what would it be and why?
The assumption is that everyone on the server would be subject to the same cost price, and just that one rule would change. This also assumes that a full active player base for that rule exists.
Example:
I would pay an additional $5 a month to play on a server where no one can use their mouse to click skills. You can only use keyboard key binds and MMO mouse buttons.
I just think it would be a smoother experience. I feel like I would be more confidant in my fellow server goer, knowing they are not still using their mouse to click their rotation like it's the dark ages.