I wouldn't read too much into her being calm with your friend. Some of it is attitude and snakes are very sensitive to how relaxed or tense we are, but also remember that they are most defensive when being pulled out of their comfort zone (the enclosure) and once out they're a lot more likely to run than strike. Burms are notorious for this; very hissy and flinging coils in the enclosure, puppy dog tame out of it. Had your friend removed her from the enclosure it's very likely she would have struck out at him at the time.
One trick to getting her out easily is to put a washcloth or dish cloth over her head before you pick her up. You can also try slipping her into a bag, where she feels secure, and then just hold the bag in your lap for a while. She will start to associate your scent with warmth and security. I actually use a sleeping bag for my adult retics; they "hide" in it and are usually quite content to stay put for a few minutes while I clean the enclosure. My Burmese also loves it.