Okay, first of all...that picture is my avatar because it is as amazing as it looks. I think I only got Isaac to fall asleep on me like that maybe three times. Ohhh how I loved it beyond anything. I have had him walk on my chest a little and allow a bit of cuddling, and he loves a good head, back, or lower beak-cheek rub. However, they are only feel that vulnerable for a very small period of time. This is when i first brought Isaac home and he was between 9-10 weeks old. I picked this guy because when I came to visit him, he found some sort of comfort in cuddling next to me. I would stroke his little head, smile at him like a kid at Disneyland, and just totally love him up in expressions and words. I brought him home and he just wanted to be close to me. I would put him on one end of the couch, then sit on the other end, and he would clumsily march right over to me on his over-sized talons and crawl up onto my chest. The image of my avatar touches me and takes me back to those days every time, and it puts into perspective just how much I love this lil guy and what we share together.
These days, he is still rather clingy. My shoulder is the prime destination the majority of the time. But he won't be crashing out on my chest anymore. Once cuddly, and if they are kept in low stress environment, they will retain some cuddle-factor, but you will realize that it is on their terms. You can't make em cuddle. I cherish the moments that Isaac gets into one of those moods which is thankfully still quite often.