Red Kryptonite brings out the rebellious and immoral personality of Kryptonians and rids them of their inhibitions. However, how would the Red rock affect a Kryptonian like Zod, who was already sadistic, cruel and ruthless.
Martha stated 'it doesn't change who you are, it just dampens your inhibitions. You need to start being more honest about the way you fee'. Going by this, It amplifies what is already there(Your feelings).
Alternatively, how would it effect a krptonian who never suppressed their true thoughts and emotions for example, a person who was completely happy in life, someone that wasn't holding anything back. Would they just become more lazy?