A few things I've noticed about contemporary romance tropes, and why some of them keep working long after they should've worn out.
Fake dating works because it gives two characters permission to rehearse intimacy before they're ready for the real thing. The whole trope is basically an emotional loophole. And readers can feel the difference between a writer who understands that and one who's just using it to get two people in the same room.
The grumpy/sunshine pairing sells consistently, but I think most writers misunderstand why. The sunshine character doesn't fix the grumpy one. They make the grumpy character's walls visible. You can't see the wall until someone stands next to it who doesn't have one.
Talia Hibbert's Act Your Age, Eve Brown does something with the grumpy/sunshine dynamic that stays with me. Jacob is autistic and particular about everything. Eve is chaotic and warm and constantly breaking things. The trope gives Hibbert a frame, but the real work happens in the moments where Jacob's rigidity is shown as a form of care, not a flaw to be softened. She once said, "I don't want to transport them to a world where those things don't exist; I want to take them to a world where they exist, but don't prevent a happy ending." That line tells you everything about how she builds characters inside a trope without letting the trope flatten them.
Forced proximity has a shelf life. It works for one book. After that, you need a new reason for these people to be in the same room, and "snowed in" or "only one bed" stops being clever the third time a reader encounters it in a month. The constraint has to feel like it belongs to these specific characters, or it reads like furniture.
Second chance romance is the hardest trope to pull off because you're asking the reader to invest in a relationship that already failed once. The breakup has to feel earned in retrospect, and the reunion has to feel earned in the present. Most manuscripts I've read get one of those right. Getting both right is rare.
Tropes function as compression. They let you skip the first twenty pages of setup because the reader already knows the shape of the thing. That's a gift. But it's also a trap, because if you lean on the compression too hard, you end up with a story that's all shape and no weight.
The enemies-to-lovers trope is weirdly dependent on the quality of the enemies phase. If the conflict feels petty or manufactured, the "to lovers" part can't recover. Readers don't just want these characters to stop fighting. They want to believe the fighting mattered.
Becka Mack's Consider Me taught me something about sports romance that applies to all contemporary romance tropes. The hockey player's body in that book reads as vulnerability more than attraction. Carter's physicality is the thing he's most confident about and also the thing that makes him most exposed, and Mack writes the tension between those two realities in a way that makes the trope feel like it's carrying emotional freight instead of just providing an excuse for shirtless scenes.
Readers respond to tropes the way they respond to covers. They use them to self-select, to decide whether this particular book is for them. Writers sometimes treat that as reductive. It's actually a sign of a deeply literate audience that knows exactly what it wants and is waiting to be surprised within those boundaries.