How you sleep

Jim Kirk:
Jim likes room when he sleeps and so do you. The two of you usually hold hands or cross your leg with his. Something to keep you two connected, while still having room for sleep.

Pavel Chekov:
Pavel loves to cuddle. He would hold you in a way that is comfortable for both of you, but with mostly you in mind. If you didn't feel up to cuddling, he'd give you room but move closer once you fell asleep.

Spock:
Spock doesn't sleep as much as humans. He will typically hold you until you fell asleep and then work a little bit on a PADD, careful not to wake you. But he kept you close to him at all times while you were asleep, that way if you woke up, he'd be right there to hold you.

Leonard McCoy:
You two slept with your backs together. It was a little thing the two of you had going on, you'd watch his back and he's watch yours. Forever and always.

Hikaru Sulu:
You and Hikaru slept face to face. Your hands would be held by each other's hearts, sometimes your foreheads lightly touching. In the morning, he would lighting kiss you to wake you up before he got out of bed.

Scotty:
Scotty usually had to leave early in the morning, so he would try and sleep close enough to you that it was almost cuddling, but far enough away so he didn't wake you. Either way, you were happy with it.

Khan:
Khan was never big on sleeping. He usually never did, just didn't have to. His blood was that genetically alerted. So, he just would lay with you in any position you want. Once you fall asleep, he would either stay with you, or sit in a chair across the room. But he never left.