What makes a great and awesome romance novel?

Plz share and explain what you like, what makes a romance novel awesome/great and what's too predictable. Tell me what you like go all out!!! Share your opinions/thoughts with me
Update: I'm working on a romance/drama/action novel. I am 18 and i would like to know what really entertains people. I think i want to write a book but i want it to be romance/action/drama type of thing. And unpredictable.
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