do not ever seem to look forward to being held. They often don't seem to mind it. On the other hand, if I get near my BCI's Cage, he is right there waiting to come out. He usually doesn't want to go back in. As soon as the lid is off, of his cage, he is crawling up my arm.
Ball pythons are very hide oriented, so if you want one to be comfortable being held, make sure the snake is covered with a hand towel or something similar. They seem to be most comfortable being held, when they can curl up under something with just their head hanging out. I usually drape a hand towel over my left arm, and let my BP Delphi crawl around under it. She also seems to enjoy sitting in the collar of my shirt, with just her head peaking out. She will curl up behind my neck and stay like that for many hours. BP's seem hard wired to want their body covered. Keep the body covered and you snake will be more comfortable being held.
David