Intelligence
Scientifically speaking, intelligence is highly valued in multiple arenas. It is so highly sought after that universities, in spite of being institutions where one learns, force you to display your intelligence via a standardized test before accepting you to learn from them. Yet potential partners love to see intelligence because they feel this person can have a conversation with them about anything. They also feel that person will potentially provide well, and assist in any major familial need.
Some people even seem to only be attracted to intelligent people. This often falls under a sexual orientation of sorts called “sapiosexuality.” This might make someone bisexual, but you can be straight or gay and only be attracted to intelligent people that fit the sex you have an interest in. There can be a fine line in just how smart a person wants their partner to be. Some find genius-level people to be too smart, causing them to fear dating those types of people. In spite of this, evidence proves intelligence is one of the most attractive human traits that people value in potential partners.