I have been bit by my male spider the day I was picking him out. He was in the display case at the show with another male and I had one in each hand, trying to decide which one I liked. He bit me so I decided he picked me, so I took him home. He's never bit me again. My male albino tagged me a couple weeks ago but that's because I dropped his rat in the tub and went to reach for it.
I've been bit by numerous baby burms and boast though, the little turds.
When I'm picking my snakes up and I'm concerned if they are going to strike, I reach for them from behind of where they are looking, if that makes sense. plus they can sense your nervousness so just reach right in and pick them up. Don't hesitate.