Not about herps but I don't see this problem in the invertebrate hobby. I think that even the most experienced keeper has at least one Chilean rose (Grammostola rosea) in his collection. Just taught I'd mention that.
On the other hand my favorite snake is the red tail boa and own a pair. Personnaly........they could be worth $20 or even $2000 each, they'd still be my favorite. I think there is also a hint of personnal taste in what you keep.
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