The push-pull between a warrior's pride and domestic life never gets old for me. So many fics explore Vegeta reluctantly adapting to Capsule Corp life—Bulma dragging him to social events, him trying to understand human customs, dealing with Trunks’s antics. That friction is comedy gold, but the ones I bookmark dig deeper, showing how his rigid discipline clashes with Bulma's chaotic brilliance, forcing both to grow.
Another massive category is the 'what-if' of their early days, especially post-Namek when he's first stranded on Earth. The tension writes itself: a wounded, proud alien prince dependent on the galaxy's smartest human. I've read versions where he's openly hostile, others where there's a grudging respect that simmers into something else. The best ones make Bulma just as stubborn, refusing to be cowed.
There's also a whole subgenre of fics that shift the timeline, like Bulma accidentally traveling back to the Saiyan saga or Vegeta arriving on Earth earlier. They often focus on how a single change alters the entire dynamic, sometimes preventing future tragedies. I lean toward the angsty ones where their connection changes the course of events, but the bond still feels hard-won, not fated.
And you can't forget the family-focused plots post-Buu, exploring Vegeta as a father to Bulla. Seeing him grapple with protecting a daughter in a peaceful world, while Bulma navigates his overprotectiveness, hits different than the Trunks-era stories. It’s quieter, but the character growth feels earned.