You've gotten some good answers. I would say integrity. If you don't have integrity you won't have self respect, or respect others, you won't be trustworthy, you won't try to do your best. If you don't have integrity you have nothing.
Don't be so trusting, there are bad people out there that WILL lie and hurt you. Always talk to your family on anything that bothers you, don't keep it inside and to yourself, a problem shared is a problem halved. Is what my dad always told us.
If its a girl then choose a smart hardworking guy with no addictive habbits as half their genes will be produced in your children. I wish I had of thought of this when I was younger but it never crossed my mind. I have a daughter to a ex con ( burglaries) & a son to an alcoholic. Bad man choice both times. If its a boy. Make sure you use contraception so no girl gets pregnant to you before you want to marry her.