Depends on who and how many you share with. When I was at university I shared with this girl who was a ****ing nightmare. She would be in there for hours at a time, have sex with her boyfriend in there, not clear up after herself, use half of my products and worse of all was that she had really long, thick, dark hair, half of which would be left all over the place. Just an absolute nightmare.
That said, where I'm living now I share a bathroom and it's smooth sailing, absolutely no problem at all.