I Generally don't like reading Yuri with overly boyish looking characters or "butch" too, not discriminating or anything btw, I think people can dress and act the way they want, it's just a matter of likes, since when I google yuri doujins I expect to see two girls instead of one girl and one that is a girl but doesn't look like one.
So in this case the character just has to "grown" on me like others have in some doujins - because I think they can be pretty cute too, I only noticed Amemori was a girl when I saw her long eyelashes up close, it's just that on the 3 cover pages she really looked like a guy so she left me with that impression xD
Btw I agree with everything that Winterbear said.
