I got my BP on Sunday. He seemed to settle down by the second day into a routine. No pacing or anything. I started handling him the next day. Just a couple of minutes with me holding him in my hands. Then I put him back in his cage by a hide. It's only Friday and he already comes out of his hide in the evening and seems to ask to be held. So I do. Though I haven't held him today as he just fed yesterday (and yet he's still at the front of his cage, asking to be let out).

He seems to be unusually curious and friendly for a BP though, from what I've read on here and other sites. He isn't shy at all.

Every snake is different, but for most, it's probably safest to at least wait until they've settled into their cage.