I currently have 3 snakes, 3 different species, so...this is all FWIW...
My MBK is the calmest, most tamed snake ever. I can rub her chin, turn her head up to look in her eyes, aim her in any direction of travel...she simply doesn't care. When being held, she will often just curl up in my lap or my palm and sit there for a half hour or more before deciding that she needs to move. And when she DOES move, it is very determined and lazy-like. She doesn't ever seem to be in a hurry or afraid. However...she is very tail shy. If I so much as touch the tip of her tail, she will very quickly take all precautions and hide her tail underneath the rest of her body, as well as turn and stare at my fingers, to be sure precisely what it is that is touching her tail. She doesn't strike at me for it, but I can tell she doesn't like it. I respect that.
My corn is a tad tail AND head shy. I can touch her chin without any drama, and I can rub her tail without any drama. But if I try to touch the top of her head or "pinch"(obviously, very lightly...not to hurt) her tail, she will freak out a little bit, and move that body part away from me.
Soleil, the florida king, is rather jumpy about things that move near her head. If I am holding her, and I move my hand too quickly near her face, she will startle, and spring back into the "S" position, but no longer strikes, and settles down quickly. She used to strike if I moved too quickly and startled her, but never actually got me while I was holding her. I think it may have been mostly bluffing. She isn't tail shy, though...