One quality I look for in a romantic partner is....

Reason

Not to mention someone to have a good laugh with.

Loyalty and trust.

Ability to laugh and communicate effectively. And to be adventurous. To not settle into a mundane routine.

And if they can't cook you'll need a good chinese around the corner

@Laura i dont think one quality would be enough there basics any relationship cant succeed without them like #respect first of all ,understanding , loyality ,love ,passion , support ,security but if there just one out of basics would be(((( no judgements)))) ,express myself with all thoughts feelings i have without feeling am being judged that what we call it real security

@Laura

the ability to laugh. more than anything, if they can't goof around with me and make me laugh just by being them then they're not right for me.

Perseverance

@Laura

Kindness

Empathy, or Compassion

Both are important

but if I pick a fun quality, I choose Humor

I'd agree with you a sense of humour can see you through a lot of difficult times.