Relationships should build at different speeds depending on how well they’re traits would mesh. Or, for an easier system, you could have zodiac signs based on your personality and that would influence your relationship. I think it would be cool to have relationships build at different speeds because some friends become best friends straight away. Also, I would like an interaction that really boosts your friendship really fast if I don’t feel like doing ‘Tell a joke about penguins’ 89 times. Maybe it could be a reward interaction if you have a system like the lifetime happiness system in sims 3.