The most important quality I look for in another person is a sincere heart. I love it when you are able to easily communicate with another person and that person has your best interest at heart, as I will have their best interest as well.
I welcome a calm and positive person; a person I can feel good about. I seek a person who enhances his life and everyone around him by his very being. I really like to get to know who a person truly is on the inside. No masquerade, no facade: just true you. Facades do not become me, and I don't wear them well.
I'd just like to add...
Everyone says love hurts, but that is not true. Loneliness hurts. Rejection hurts. Envy hurts. Losing someone hurts. Everyone gets these things confused with love. But in reality, love is the only thing in this world that makes someone feel wonderful. So love like you've never been hurt!