Generally, unless you hold them from hatchlings fairly often, most will continue to be rather nasty. And even then there's going to be some stubborn freaks that don't want to settle down much either. I've heard of "some" that are pretty docile, but this is an exception, and not the norm. Both of mine are little devils as well, but then again, I don't hold them much either, as I have a good amount of other snake's that are much more pleasurable to hold when I want to do so.
This said, you'll either have to get an older one that someone's already managed to tame quite a bit(not likely), or take your fair share of nips and musks trying to get yours mellowed some. They just aren't known for their placidness(under-statement of the century!..LOL!), but ithey have been known by some to be quite handleable with some time.
If you want a white snake, I'd really recommend a "blizzard" corn. You can't really beat their mild nature.
best regards, ~Doug

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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"