I like when the outfits are described and last into the fights. Both fighters simply starting naked is kinda boring.
I like when theres contrast between the fighters. One exactly mirroring the other (generally aside from hair color) is also really boring to me.
Fights HAVE to have a winner. Draws, especially without a sequel, are a drag imo.
Trash talking, lots of trash talking please.
I like seeing the mindset of both fighters throughout. If someone is being choked and it's her first fight, she's gonna panic. The person losing a blood feud might be afraid.
I have more preferences, but these stand out to me