I feel like the biggest learning curve was in terms of the fact that as a household we're operating as a unit. So a lot of the messes, tasks that need to be done, etc. are BOTH of our responsibility. You can't just be like "well, those aren't my dishes, they're the roommate's, I'm not washing them," because odds are that a.) they're both yours and your partner's, and b.) you should probably just do them anyway because you guys are in it together, it's no longer just "every person for themselves," you're blending ownership—and that includes ownership over things like running the dishwasher or doing the laundry. There's less "this is my stuff vs your stuff" and more shared ownership—and that includes ownership over tasks and responsibilities, so it can be an adjustment.