Curious about what result living with a roommate can have on you? The New York Times reports on the body of research on how your #apartment mate can affect you, from research done on first year college roommates.
With female roomies, if one roommate is heavier than the other, the thinner roommate tends to gain less weight on average than those with a thinner roommate. The reason is that four out of five overweight roommates are on a diet and these habits rub off on the thinner roomie.
In male roommate pairs, if one roommate is depressed, the other roomie may become more unhappy themselves. This tends to happen when the depressed student doesn't express his feelings. It doesn't mean that the non-depressed roommate will develop depression, however. There is no such transference between roommates if they are female.
If one roommate brings a video game console to college, it will lower the other roommates grades because they will study an average of half an hour less than those without a video game console in their room. These leads to grade averages that average 0.2 lower than students without gaming consoles.
If a non-drinker rooms with a drinker, they are more likely to become a drinker as well, leading to lowered grades. On the positive side, if roommates are of different races, this leads to increased tolerance for people of other races and diversity in their friend pool.