Well, I'm late for the party, but i have to say....
adding to the deluge of hate...Doctor Badger. Reflects all the negative sides of the furry community, in a much worse way that Kiro or Emmy could do.
Celise and Flahne...I can't think of goo without thinking on "The Blob" and acidic death. I wipe out as much grey goos as I can on Anno quest.
Bess/Ben and Gianna. I prefer to having intercourses with an organic being, thank you.
Anything treated.
I have a strong dislike for anything above C cups and/or with a dick too big for its body, so Penny, stop at 6 in. It's kind of sad that Kelly hasn't a scene for fucking the plyer ass, because dickgirls/herms penetrating males are my favorite thing, only below the extremely sparse male/male content, and it makes me like a herm/dickgirl NPC despite being...oversized.
and in a single word, Ausar, I don't know why, but something on them, ehh,ticks me off, with the exception of Emmy.
Unlike most, I like Embry, and Cameron is my fav male character until now, Gene was a bit of dissappointment cof cof...2 humanoid 4 me.. cof cof., specially his dialogues, but any potential m/m content is well receives.
So that were more or less, my dislikes and hates over the NPC's.