I think my biggest shock was how much I loathed most of my flatmates by the end of first year. I had two friends in a flat of 10! The others were utterly filthy to the point were I couldn't stand being in the kitchen, or cleaned up everyone else's mess with no thank you's whatsoever. They were rude and would always steal food from our cupboards/ fridge. Before I moved out at the end of the year, I went home for a week and came back to find someone had stolen all of mine and two of my housemates kitchen stuff and cupboard food. It was a huge shame, I was always told that some of my best friends would be my flatmates! :[