I hope that the game doesn't center all around your character. Everyone has routines, everyone does have roles and some NPCs have really important roles. That being said, I would love to see another couple get married, I would like to see a bar fight that involves 2 other dudes, not our character, I would love to see a rogue committing homicides in town besides me.
Spoiler It was already confirmed that there is a quest where a beautiful imperial woman loves a wood elf but this imperial male wants you to assassinate that wood elf so he can get with her, so that's already something.
But yeah I would love to see other weddings take in place and possibly be a wedding crasher.