Your favorite specimen from Alien: Earth

Of all the specimens in Alien: Earth, besides the Xenomorph, which one was your favorite?

I might be in the minority here, but I actually was most fascinated by the Plumbicare / Orchid specimen. We barely got to see much of it all season, but it presented so many unknowns. The finale really showed how vicious it can be too and I personally think it's the most interesting one.