Dayo Fluffs different also depending on if he's just relaxing or angry/after something.
The satisfied, relaxing fluff is just all over, looking around, eyes maybe blinking as if he's going to go to sleep.
The angry, aggressive fluff is different in body stance, eyes pinned, head could be down or way up etc.
You will learn the difference as you watch your Grey closely. You just need to pay careful observance to his body language language meaning eye's, stance, feather pattern of ruffle etc.
Hope this helps. :-)