I feel like it is unfair to choose before moving in right…? I don’t wanna sound immature and rude…
It’s not a bad idea. Some ppl don’t want to sleep facing a wall, so…or if you want to bunk/loft/elevate.
Many dorm rooms are symmetrical so it doesn’t really matter.
Some roommates choose not to have “a side” as it works best for furniture placement/space.
Not all roommates have the choice of waiting because many move in early for various reasons - programs, athletics, etc. That said, if there is an issue, either discuss it directly and calmly, or ask for a switch at mid-year if there is a clear preferred side to the room.