Are barracks soldiers allowed to make a request to switch rooms, or get a new roommate?

Yes you can. Ensure that you have a good, valid reason to request this switch.

Absolutely, speak to your first line first and they will relay to your 1SG. Be aware that you’re gonna need a reason more than just “I don’t like the person” or “ I want to be with my friend”

You are allowed to request it. Sure. That's just a conversation. It's not guaranteed it'll happen but you miss every shot you don't take.

SPC (Join to see)
You have received some great advice from some of our best senior people on the site.

Guess it's changed since I was in. You were assigned by squad & squad mate per room. No "requesting" shit. Either you got along, or you fucked each other up...THEN, you got UCMJ'd and moved. No other way. But I wasn't in during this "new" snowflake/I'm an emo era. You just did, sucked it up, or got the hell out....Vietnam Vets didn't/never gave slack. And most my Command staff were Vietnam Vets....