carrying toilet paper with you everywhere
secuestering toilet paper from the stall if it does have toilet paper
washing your underwear in the shower
wearing flip-flops in said shower
being really excited about having hot water
being really, really happy you have 24/7 access to a bathroom...like really happy (it's super stressful not knowing where you can pee next in case you're wondering)
rolling all of your clothes, even though you have a dresser to put them in
or ignoring the fact you now have a dresser and leaving them in a pile around your bag
being surprised your clothes are washing-machine-level-clean...and smell good
getting really really excited about clean white sheets that aren't worn through
being excited about not sleeping on a top bunk-bed...knowing that bunk beds aren't limited to two levels
refusing to buy normal size toiletries
keeping your fold-it travel toothbrush
constantly thinking about the amount of clothes you have...and if it will fit in a pack for the next trip

Thanks to Clara, Cassandra, Quyên, Anneliese, Emma, and Caitlin for contributing to this post!