Can we talk about what 'best' means for tension? Because sometimes the most popular recs feel like they're chasing the same energy. I've read tons of BatCat fics, and the ones that stick with me aren't always the ones where they're constantly at odds or ripping each other's suits off. Honestly, I think a lot of writers get tangled trying to mimic the best-known comic runs, and it starts to feel like a checklist: rooftop banter, check; moral disagreement, check; dramatic reunion, check. The tension feels manufactured.
For real romantic tension, I keep going back to quieter, more grounded stories. There's this one on AO3, 'Gravity's Pull,' that's set after a long retirement. They're living under assumed names, and the tension comes from whether this domestic peace is a victory or a surrender. It's all in the small gestures—the way she still hides her lockpicks, how he sets an extra place at dinner automatically, even though they eat alone. The romance isn't in the chase; it's in the shared history that's both a bond and a wedge. That's a different, deeper kind of tension.
I also have a soft spot for AUs that transplant their dynamic into a totally new context but keep that core push-pull. 'A Thief in the Law' is a noir AU where Bruce is a detective and Selina's a socialite with a secret life. Because the superhero stakes are gone, the tension becomes purely interpersonal and professional. Will he discover her secret? Will she use him? The slow realization and the betrayal hit harder because the genre rules are different. You get the same cat-and-mouse, but the mouse doesn't have a Batcave full of gadgets, which changes the power balance interestingly.
Lately, I've been skipping anything tagged 'slow burn' if it's over 100k words. Too often it's just padding with the same arguments repeated. Give me a tight 30k where every interaction has weight. Sometimes the best tension is in what's not written, in the space between chapters.