Late Night Thoughts about My Roommate

I've been trying to figure out if what's happening to me is normal or not... Ever since moving into the dorms last month and sharing a room with my roommate, I've noticed that she keeps leaving her stuff all over our shared space. It gets on my nerves so much because honestly, who doesn't like coming home to a clean room? ...I'm not sure if it's just me being too picky or if she should be more considerate... Does anyone else feel this way about their living situation?