Aak's kind of a weird sleeper because he hasn't really had comfortable places to rest in a large part of his life. And even at Lee's place he's crashed on the couch, lmao.
He's a light sleeper unless he's super overdone it and stayed up 24+ hours. I imagine at this stage in his life he's not good with cuddling but could probably grow into comfort with it.
For romantic instead of necessity-based bed sharing I think he likes to have his head near the other's chest so he can hear their heartbeat. So, either curled up under their chin or resting his head on top.
I imagine aakechi as like... Aak wakes Akechi up in the middle of the night over dumb shit, they are up for a bit, then Akechi forcibly wakes Aak up before leaving for any morning TV promos/jobs. it's like a off to work kiss but being a jerk instead.