If money and logistics were no objects, I would have to say, I'd want an anaconda. They are just such huge, beautiful animals. I know there are people out there who keep them, and if they're successful keepers, I sincerely admire them.
But logically, I do not want anything that could potentially and reasonably kill me! I think that my dream sbnake, therefore, would be a regular old Ball Python like the ones I have now. Morphism and what's "in style" really have no effect on me; I'd rather have a nicely behaved and well-feeding Ball than something I've been convinced looks better.
But gee whiz, those piebalds are HOT.