So here I am again, with a new suggestion. It'd be just a fun thing to implement into breeding, or even something you get randomly in a lion. Some could be 'rarer' than others.
Quirks. Little bits of random personality for an individual lion/lioness to have.
Examples:
Is a habitual sniffler even when he or she is healthy.
Regularly looks up at the sky to check the position of the sun/moon and comments on it.
Is unable to digest proteins correctly and gets very ill if too much meat is consumed.
Makes up random lies about unimportant things for no reason. (or habitual liar)
Has a weakness for rescuing animals.
Is unable to take advice from anyone because he or she thinks that they know it all.
Doesn’t eat green things.
Can only see out of one eye or hear out of one ear.
Overly honest.
Likes to squish ants.
Enjoys watching others suffer.
Big smiler.

So whatcha think?