I curl up in a ball when I sleep or stretch out with my legs and arms in front of me XD To my knowledge, I don't make any proper noises in my sleep (though sometimes, like most, I mutter or whatever) although I did go through a period were I would periodically stop breathing while sleeping (a trip to the vet was in order, lol!)
Though if I hurt myself (like if I trip up or whatever on a wet floor, which happens maybe a little too often
) I do whimper- if I'm annoyed I'll growl or do that groan-y kind of noise that dogs make
I also have bitten in play-fights with my brother too lol nothing sexy like; just a bit of fun :O