What make relationships work in your opinion

Communication.
Good understanding of themselves and their needs which can then allow for compromises and security in the relation.
Ability to accept someone as they are.

Pushing the right buttons in the right order.

Thoughts - As in your first thought when you wake up and your last thought as you drift to sleep 😴

both working all the time and never seeing each other to get fed up.

Honesty. Genuine feeling. Communication.

Communication and love

Nothing

Fun

Love .. along with communication, effort, honesty, trust, etc

Compromise, caring and closeness.

Friendship