Disclaimer: I am probably more particular than most roommates that anyone will ever encounter, and very random things can drive me nuts. However, there are many things that roommates do in general that would irritate anybody. I am also not claiming that I am the perfect roommate, as I am guilty of some things on this list myself.
1. Not changing the toilet paper roll.
2. Leaving hair in the shower.
3. Leaving dirty dishes in the sink for days.
4. When it's midnight and you're trying to sleep, but suddenly it's social hour in your common room.
5. Leaving makeup all over the counter in the bathroom.
6. Getting toothpaste all over the sink and being too lazy to rinse it.
7. Letting the trash pile up until it looks like Mt. Vesuvius.
8. Ordering takeout and stinking up the whole room.
9. Forgetting to turn the light off before they get in bed.
10. Snoring
11. When you're freezing your ass off and they decide to open the window.
12. Or refusing to open the window when it's sweltering outside.
13. Being super loud in the morning while they get ready and you're still sleeping.
14. Taking naps at the most inconvenient times.
15. Yelling at other roommates for things they do themselves.
16. Eating all of your food.
17. Playing videos/music out loud when you're trying to study.
18. Treating the common room like a second bedroom.
19. Leaving the sponge in the sink so all the nasty food and drinks can soak into it.
20. When they use your stuff without asking.
21. Using your dishes and then not washing them.
22. Taking your clothes.
23. Not replacing common items like toilet paper, tissues, hand soap, etc.
24. Getting "sexiled"
25. When someone misses the trash can and thinks it's chill to just leave the trash on the floor.
26. Having pets.
27. Not contributing to cleaning common areas.
28. Taking up all the closet space.
29. When you're trying to quietly do work and your roommate takes a phone call in the room.
At the end of the day, though, no matter how much they may annoy me, my roommates are still my best friends.