Lately I've realized something too about what I like in a good relationship:
Response vs. Reaction
or,
When a person is being sincere, or vulnerable, or trusting, or weary, or discouraged, or trying to put words to some very exciting totally innovative new idea (as long as it's legal and safe and not hurting anyone!) it's great if a partner can LISTEN and not tease or say "You feel what? That's crazy."
It's wonderful when a partner can remember when an issue is important to their partner and apply what they hear, and remember and respect emotional boundaries.
And I love people who think before they talk. Love them.