What draws you to a person romantically (other than physical characteristics)?

I recently listened to Alain De Botton addressing employees at Google, and he was making a point about how we tend to be drawn toward people that feel familiar, rather than people who are good for us in romantic relationships. Hence, people in abusive relationships end up in more abusive relationships, people with quality relationships tend to pursue quality relationships. What do you think?

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I noticed a theme of similar interests in the genuine opinions. But a lot of people may have similar interests. What flips the switch for you from "we like the same things" to " Woah, I am really attracted to you"? As an example, for me, it was feeling protected and safe. I could be vulnerable with that person and was still accepted.
What draws you to a person romantically (other than physical characteristics)?
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