More negative traits please. I want the option to have sims start with nothing and everything against them, but overcome all that and find success.
I like to see a system where sims can obtain a negative trait but can get rid of it if they work hard enough. Should be able to start with these traits too, for the increased challenge.
Alcoholic for example. Sims medieval has alcohol, its just dumb the main series does not have it.
Agressive could also be one, making sims start fights and such. Meditation, anger management classes and other stuff could help solve it.
Gluttony too.
Heck maybe they should pretty much have all seven sins represented.