Found this fun set of questions for OC couples, but they weren't numbered, so I decided to number them for convenience. Feel free to use these questions for your own characters or ask me about mine.
Who is the most affectionate?
Favorite (non-sexual) activity to do together?
Who drives? Whose passenger princess?
Most likely to carry the other?
Always wants to take a selfie with the other?
Has the weirdest taste in music?
Who is embarrassed to take their clothes off in front of the other?
Who is the most ticklish?
Who brings an animal they found home?
Who holds the umbrella for the other when it's raining?
Who tries to playfully embarrass the other in public?
Who kills the scary bugs?
Who asks the weird questions at random in the middle of the night?
Who hogs the blankets/covers?
Who always makes coffee for the other?
Who cries the most while watching movies or shows?
Who gets scared during horror films?
Who tells their family about the relationship first?
What do their friends/families think about the relationship?
Who is more likely to ask the other to dance with them?
Who wears the other's jacket?
Who whispers inappropriate things in the other's ear at inappropriate times?
Who makes the other laugh the most?
Who needs more reassurance?
Who would have to bail the other out of jail?
What would be their theme song?