This is a mature answer and I'm answering you because as christians/catholics we (should) share the same goals.
Choosing a woman to seriously date or to marry is not like choosing the toppings for your ice cream, nor like choosing the video you are going to M with.
Trust me when i say that P twists perceptions of how things should be, specially in sex and relationships. You are so used to pick between blond or brunette, or between goth or country, that you forget that they are persons too.
I suppose you are still young, so let me tell you: it's ok, we've all passed through that.
When choosing a woman to with you expect to spend the rest of your life with, you don't focus on whether if she prefers burger or pizza, or red or blue, because that are not traits that define her.
You are not getting married to a woman who dislikes tomatoes, you are getting married to Sandra, Paola or Linda, who is generous, caring, loving, hard-working, etc... and who dislikes tomatoes.
Do you see the difference?
However, you do get married with a selfish or a lazy person. That characteristics will affect your relationship, and those are the things you should focus on.
Inside the vast concept "goth" there are plenty of different woman: some may be caring, some may be boring, some may be funny, some may be manipulative, some may be resentful...
Choosing a lifetime partner by her looks would be like choosing a car by its color. A guaranteed failure.
So, what should you do?
First, set your priorities. You said you were looking for a christian/catholic who desires to start a family. That's a good start. Without aligned life goals, a marriage is running towards failure. And starting a family is no joke. It requires mutual sacrifice.
(When saying aligned life goals, i mean those who don't intefere between each other. You both may want to start a family, but individually you would like to be a great singer and she would to succeed in her bussiness. It's ok, it doesn't interfere with each other.)
Focus on realistic "must have" characteristics: if she has your same values, if your goals are aligned, if she has a sense of humor, willing to sacrifice for the family... State the essentials and realistic characteristics your wife must have.
There are other characteristics that you may wish, but are not really essentials. State them too. In my case, i would love is she had a great voice, but it is not a prioritie. I could live without that. However, i like music, i like to play instruments and i like to sing, so i couldn't get married whith someone who couldn't stand that. You don't have to share your all your tastes, but for the lest, you should not disapprove them (as long as it is not a physical or spiritual unhealthy one, of course).
Second thing, and the most important one. Focus on becoming who you would like to marry to. It is often forget because people tend to think what they expect from the other, but don't forget to cultivate yourself as much as you want you wife to do.
There is a simple way to know if you are going the right way. Ask yourself: Would i like my daughter to marry someone like me? As a father, you would want the best for your children.
Become the man you would like your wife to marry to.
Third thing. Focus on knowing the person. First befriend them, get to know them, and then judge whether if you would like to date with. Try to meet people who you share values and goals with. Again, don't focus on whether they are country or goth. Those doesn't define the person. And if they did, i personally wouldn't like to marry them. I want to marry a woman, a person, an exceptional individual, not a generic urban gang.
And to finish: be patient. Everything will come in time. Focus on cultivating yourself, and let god do his will.
