Sometimes they're less head-shy than others. I have some adults who won't even let you go near their heads, and others, both hatchlings and adults that don't seem to mind at all.
Each ball python is different, and if your husbandry is spot on, then you just have a gentle snake.
oh cool thanks guys, this site is like amazing haha, seriosuly ive been so paranoid cause my last BP died of some nervous virus and I've just been staying really on top of my new one jsut to make sure all is well and this sites been a big help