If I may give you some sort of "advice" on this personal matter, my take is that you should remain relatively open-minded, you should not go with a fixed list of criteria in your mind and examine these girls as if it were some sort of quality control inspection. That is not the way a relationship works. For love and attraction to arise, I believe there has to be an element of surprise and unpredictability. You are right to be careful that she will share the same fundamental values and principles as you, but, as long as you agree on the latter, a few differences can do you a lot of good. Living with someone who is too similar to you may be comfortable but it can be pretty boring too.
Don't get engaged if you do not feel strongly attracted. That woman is not going to be just a reliable partner or someone you esteem. If she makes you feel vulnerable and insecure, it's a good sign. She's got to challenge your notion that everything is under control. If you want to let that happen, you need to expose yourself.
Good luck !