I have yet to get any "real" holding out of my vagrans. It may just take alot of time to tame them, but for a snake that seems to like handling, or at least tolerates it, I suggest Thamnophis sirtalis ssp.
So, it's up to you whether you want to try and get him to handling status, keep him as an observable pet, or release.
It all depends on why you got the snake. :P