Harry: On his side, hands tucked under the pillow, making himself small to maximize the space he can take up. Falls asleep quickly. Favorite thing to wake up to: red curtains, so he knows he’s somewhere he loves, and not under the stairs.
Ron: The starfish. On his back, hands both flung up over his head, completely out of it, all gangly and stretched out. Usually one or both feet out from under the covers.
Hermione: On her side, stretched out, rubbing her legs against the soft sheets, hands tucked under one another after just reaching out and putting the book on the nightstand.
Ginny: Half twisted like she was stretching her back and left her legs to flop around. Usually moves incessantly all night. Bed hog 100%. Almost never under any covers, though she starts off with them.
Luna: Arms over her stomach, but feet pressed bottoms together. Whether to stretch her back or to dance in her sleep, she always makes a diamond with her legs, a sort of silent slumbering butterfly.
Neville: Half side. One arm up under the pillow, the other across his stomach, half turned on his hip, legs usually crossed and nudging the other side of the bed space, head turned always to the clock on the nightstand.
Draco: Pillow queen. Minimum four pillows needed, extra body pillow preferred. Two pillows under his head, one on either arm to prop him like a throne. At least three types of blanket coverings (sheets, quilt, comforter, or something like).