We usually pick a partner who will balance us. It is easy to find that an emotional person often picks a logical partner. This gives them balance within their relationship. I have told many clients that if you want to be a door mat, you will choose someone with muddy boots. If you want to fix people, you will choose broken people.
Opposites do attract.
Part of our own journey is to find a balance in our lives. The healthier we are, the more balance we find. The more in balance we are, the more balanced our choice of dance partner will be. The more extreme we are, the more extreme our need for balance. If you dance in silence, you may pick a partner who sings along with the music.