I don't know the names, so I will answer for both girls.
The big-boobs girl: I love big boobs, but not when they're
that big.
; Normally I see a girl's boobs in hentai and think they're normal-sized and my friends say "dude, those are huge." Or I'll see a smallish bakunyuu girl and think they're bakunyuu -- not ridiculously so, but still too big to be called kyonyuu -- and my friends go "wtf those are WAY too huge!!" But this woman, even
I'm like "What the fuck is going on here? -_-; Her boobs are larger than a pregnant woman's abdomen. WTF."
My main complaint with her, though, is the bun. I hate dikish-looking women, and that woman looks
SO, SO MASCULINE. She has these huge muscular thighs, she has a mannish face (jaw, head shape), and she has her hair tied up in a short bun. She basically looks like Andre the Giant with two swimming pools stapled to the front of his chest. Poor Andre.
Sorry if that was phrased really cruelly. Not trying to be a jerk. :\ Just saying what I didn't like about her and I can't put it nicely. I tried. Honest.
As for the goo girl, I don't like her eyes, I don't like how F.S. can't decide between three fetishes for her and he ends up trying to have all of them and really perfects none of them (goo, kemonomimi [bunny ears in this girl's case], and symbiote-host relationship between two different entities [the girl's mind vs. her hands, which seem to be semi-autonomous]). Back to her eyes, yeah, I really dislike those: they're shaped like plus signs. Very weird. Nobody's eyes look like this: (+)___(+) . And I don't find it attractive: I find it asexually distracting, and kinda ugly actually. She's got very fair skin and pale pink hair, and that's a minus in my book. (The specific combo of those two things.) I dunno. I just don't like how she looks.
In the anime? Jesus Christ she was annoying. >_> Every time she opened her mouth I wished she'd shut it once again. Very annoying voice, very annoying dialogue. Her mouth is 10x more deadly than her boobs imo. Seriously: "lactic acid" (har har har, very punny guys ...
NOT! -.-) is much less frightening than being driven insane by that voice. No offense to the voice actress. Just ... ugh. Very whiny. Very, very whiny.