I think you got the bug. It will drive you crazy finding all those Sans. My self, I confine mostly to the S. trifasciata group. Top looks like a Sansevieria trifasciata Forescate but is actually a S. guineensis variegate of some kind. It will never have more than 3 leaves and is much more sanative than its more yellow cousin Forescate. (one on the left)

Also I got one of those Sansevieria kirkii Pulchra 'Coppertone'.

Just one of my few outside of S. trifasciata.

Also a soft spot for Sansevieria masoniana variegated which I was told grew large but thankfully mine didn't read the book.

That's interesting about the S. guineensis. I was thinking it might be doomed because the seller had probably removed some darker, productive leaves in order to make it look better for sale. (I have seen sellers (foolishly) do that to some albino succulents on eBay.). That plant is SO light that it doesn't look possible.

Yep, I'm hooked. If it weren't for this climate, I'd probably have a lot more Sans, but I'd go broke if I had to heat them all.

Thanks for the education, as always!