Everyone's situation is different but my Grey has been trying relentlessly to let her sleep on the ceiling fan mount above our bed. That's where she would prefer to sleep - with us. However wife won't let it be so I have to move Greycie to the birdroom every night. Your Grey would probably prefer to sleep with the flock, and that's probably you.
Also, I have noticed that Greycie will be quiet when I'm laying down trying to sleep, even in the middle of the day if I just came back from a long training ride or just feel like crap and am laying down...she'll be quiet as a mouse. I've heard of other's Grey that do the same thing here on the forums. They're very sensitive to what we're doing. My Caique on the other hand, will sit there and screech his damned head off if he's feeling like it.