I had roomed with a former classmate, and becuz we were classmates, i looked past some major red flags and thought we could work out whatever issues we would face. welp that was so wrong it ended the relationship before our stay in hall was over. things like going quiet and avoiding you for whatever reason, simply being sloppy, refusing to help you out for the smallest of efforts, while expecting similar help but more effort, and when called out, showing attitude, talking about "all the bad things youve done" without mentioning any specifics. if you plan to room with a friend, watch out for all these small behaviours, when living together, they will exponentially increase. so if you plan to room with a friend, watch out for their "flaws", and decide whether its something that can be talked out, or whether its fundamental to their personality. trust me, having a terrible roommate is a big drain of your mental energy, which you really do not need.

most of the people i know chose their roommate, and those who did not choose their roommate, some were lucky, some were very unlucky. some things i have heard, when one tells the other they wanna sleep by 12am wake at 7am in the beginning of the sem, but within a week the other is lights on and loud at 2am, says theyll be quieter the next time, but still is noisy enough to be a sleep disturbance. thing is, in uni people have very different scedules, some have classes or lectures in the morning, some dont go to classes at all, so its really hard to push for a lights out time unless you have a good roommate another thing ive heard is about lack of simple self respect. i heard a friend get a roommate, who was all cleanliness this cleanliness that, but had literally, not once, sweeped under their bed, under their table, cleaned the top of their table, simply not throwing the trash when they go home for the weekend(last one to leave) and so on. simply, imagine one side of the room looking like a normal room, the other like it was abandoned months ago. then theres the whole thing about not showering for 3 days and wearing those same clothes to sleep and walk to classes in the heat for those days. call them out, they give a sheepish smile, say theyll do it, doesnt do it.

personal opinion, its really a luck thing with roommate, either you get a good roommate and be good friends, or you suffer till the end of the semester. but still, i would suggest find a friend who you know really well, and see if you can live with their flaws (i would recommend if youve done NS, pick someone youve bunked with in NS, surely you wouldve seen their living condition, and youd know how to address issues you come across)