Give me a couple/ship that I write or have written (or created or whatever) and I'll tell you:
How differently do they think of each other now compared to when they first met?
Where was their first date?
What do their friends/family think of their relationship?
How do their personalities/skills complement or contrast with each other?
What is their favorite aspect of each other?
Do either of them have pet peeves about each other?
How would each reconcile with each other after a fight?
What would be their ideal vacation getaway together?
OCs and AUs and all that jazz are cool.