Well it seems you have said a lot more about Alex. The one thing I love about my grey, is that he is so loveable to me. He is ok with others, but I'm his guy. I use to eat it up like candy, but I have learned for HIS sake to change things. I want to hold him the whole day with my other birds, but we now have rules. Don't get me wrong, I am a sucker when he looks so sad if I don't get him. He would always fly over to me, but his wings are cliped to the 8th feather now. He flys to the ground now, and want up, so instead right back to the perch he went. All is much better now because I bit my lip and in a week he got the message. You are the boss not the slave, and in time he will know.
We do have plenty of times we hang together, but it is when I say so. (At Night, before bed)
Good luck
Joe