I use client rulers, mostly because I don't know how to disable them. In my Roman campaign they stopped getting the trait halfway through the game so every time I build a lvl 4 gov I get an interloper if I don't park him outside the city and hope he dies from a cold during the winter :D

I'm one of those cheats that start by building a lvl 4 if I can use the lvl5 native MIC, then change governments when it's done. Don't judge me :)

The client rulers and rectruitable generals were a cool addition, but unfortunately it seems like they ruin the game (ctds) more than they add to the fun.