From my personal experience, first of all, you should learn to accommodate, because college roommates often come from all corners of the country, and customs vary greatly from place to place. You can't ask everyone to keep pace, for example, roommates have different bedtime, eating habits and hobbies. Secondly, you can find the same hobbies as all roommates or individual roommates, such as a game that everyone plays, which can increase the same topics and enhance mutual understanding. Finally, after getting familiar with it (otherwise your roommate will think you are difficult to get along with), I suggest setting some rules in the dormitory, such as the order of duty, not talking after lights out, lowering the volume of your roommate's sleep and so on. As for why, don't ask, asking is the lesson of blood and tears.