A few things I've noticed about romance writing:
Romance readers have read more books in their genre than almost any other readership. I don't think most writers appreciate what this means. A romance reader with 500 titles behind her can feel the difference between an enemies-to-lovers arc written with intention and one assembled from parts. She doesn't need to articulate why one works and the other doesn't. She just knows. And she's right.
The Happily Ever After isn't sentimental. It's structural. The HEA is the load-bearing wall that lets everything else in the story take risks. The black moment can be devastating because the reader knows love is the destination. Take away that promise and the genre doesn't just change tone. It collapses. The contract between writer and reader is what makes the vulnerability possible.
Most romance writers think they're writing about love. They're usually writing about the fear of love. The obstacle in a great romance is almost never truly external. It's the thing the character believes about themselves that makes love feel impossible.
Jane Austen understood something most writers still haven't caught up to: the love interest doesn't need to be likable on arrival. Darcy works not because he's secretly kind underneath. He works because Elizabeth's specific intelligence is the only thing that could reach him. The match has to feel inevitable in retrospect and unlikely in the moment.
Romantic tension lives in denial. Two characters kept apart by a snowstorm or a misunderstanding isn't really tension. Two characters in the same room, both aware of what they want and both refusing to reach for it? That's the thing readers come back for.
Beverly Jenkins writes historical romance where the specificity of Black American life in the 19th century isn't backdrop. It's the engine. The love stories work because the world is so precise. I think this is underappreciated as a craft lesson: the more specific the context, the more universal the emotion reads.
The kiss that arrives too early kills everything that could've been built. The kiss that arrives too late loses the reader to frustration. I've never seen anyone teach timing well. It might be unteachable. You just have to feel where the story is leaning and know when the lean becomes a fall.
Nora Roberts once said, "I'm not going to write a book that doesn't have a point." What strikes me about her body of work, over 200 novels, is that the point is never just the romance. There's always a question underneath about what people owe each other. The love story is how she investigates it.