When you start a relationship, you want someone who's going to make you feel good about yourself; tell you how attractive you are, make you feel wanted and valued. And men of course want the same about you. As the relationship develops, the things you look for in each other become more detailed and expand into other areas of your life.
Men want the same thing you should want - someone they can build a life with and grow into it together - someone who's going to encourage them to be the best person they can possibly be, and also help you to achieve your full potential too. A great relationship is a real partnership, and if you find someone with similar goals to you, you can grow into it together; better than you ever could have done alone.