A human being is not like a piece of glass though which you can look and see the other side. A human being is more like a diamond, which when held against light reflects and deflects light so that a myriad of colors are seen. Were complex.
We have a lot of interest and the interests of one person need not match with the interests of another. But thankfully the interests are not as numerous as human beings. So we are bound to find a lot of people who share our interests. And if we can find someone like that, then our search should end there. So, what are your interests? That is something for you to find out.
Mind you, you might have to do some serious thinking before you level down you preferences. There might be a lot of things that you enjoy doing but about which you have given a second thought.
Your interests could be something like sports or outdoor activities. Or you could think of interests like social work or cross-words or religious interests. Keep the ball rolling; please understand that the words I have listed here are mere suggestions.
Your tastes and interests could be very different. So let them be. And once you have decided on what your interests are then half the story is done.