Simple/Compound
It is hard for roommates to get along. Their personalities are different. One person may be neat, while the other is messy. They have different sleeping schedules. One girl may get up early because she went to bed early. The other girl may stay up late and want to sleep-in in the morning. The type of music they listen to could be very different. These differences make it hard for some roommates to get along.
Complex/Compound
It can be hard for some students to get along with their roommate. Since their personalities are so diverse, it can be difficult for them to become friends. Their sleeping habits are most likely not going to be the same. One girl might be an early riser while the other girl likes to sleep in. Their tastes in music could set them apart from each other. They might have some fights if one likes punk rock and the other likes country. Some roommates find it hard to get along, but they overcome it and learn to live with each other.