In terms of judgement (as in talking to people about the book) i mostly consider writing style and the story itself. I don't like to inject my enjoyment of the two to alter how i consider the authors work on it's own.

It's complicated because i generally enjoy something well written. Separating "enjoyment" from "quality" is something that has to be worked at. But i think it is responsible to pay attention to quality in itself rather than just my opinion. Quality, being something not just that pleases me, but something i recognize that is well thought thru, fluid and either solidly normal or fluidly different.

It is easy to say if you like something. It is quite a different thing to say if it is well written.

There are plenty of well written/well translated stories that i just don't like in general (Hawthorne. He was a great writer and i hate his work...they should be read, i just hate them).

There are also tons of meddling writers whose works i love (Gabaldon. She is a terrible writer, yet has made one of my favorite stories/characters of all time. Lee Child. Again. Just a stupid person who couldn't write a grocery list, yet, his series is one of the most entertaining thing the 21st century has seen).