I read your other thread as well, and you have a love and connection with animals, this is an automatic connection. Do you talk to him a lot, always acknowledge him, these are things that make him trust you.
You mentioned your daughter has a Sheltie, are there other animals in the home as well? The Sheltie may very well be a large part of why he doesn't feel comfortable in her room. When cats bond, they sleep together, this is the sign of complete trust and acceptance.
Cats do have signals, but they are not always as obvious as dogs. Their main physical display of what they are feeling is through their tails and ears. When a tail is straight up and twitching it means they are excited to see you, when they whip it back and forth it means they are irritated and warning you they may bat, bite, or leave PO'd
.... The ears usually work with the tail, perked up is curiosity or attentive, slightly tilted to the side is frustration or unease, flattening their ears is defensive, extremely irritated, usually hissing as well and either going to attack or show submissive behavior.
I hope this helps a little
. There are threads on TCS that give links and much more information about this. You can do a search in the "search" bar at the top of the page.
I can see why this kitty loves you! You want the best for him, and he knows it! Cats are very smart, there is always a why behind everything they do.......