Being negatively selfish – This is when the person is selfish at the cost of others. Often manipulative, dominating and abusive people with this character trait would force others into submission or cooperation. They put themselves first in all situations including to the detriment of others.
Being positively selfish – This is defined by a person who helps people because they want to driven by an instinctive desire to be helpful. They put themselves first without any deliberate or ill effect on others.