Definitely cheating (including "flirting", if you have to delete text messages so your partner can't see them, you're there)
Lying depending on the severity of the lies. I'm not going to go into detail, but a small lie usually isn't a big deal.
Abuse whether verbal or physical
Monetary expectations. Be happy with the person you chose to be with, be ready to support every venture and failure, or move on.
Trying to " change" someone. I understand trying to positively impact someone to change a bad habit or something, but on the fact of trying to change who they are or what they enjoy doing; I think that's worse than cheating. You picked that person as a partner, embrace what they like doing.
