Grades depend on aperception. Ignore them, read what frees you from the existential horror of being.

临渊行 SS+ (Lin Yuanxing or Journey on the Brink of Abyss). Oct 21.
Mother of learning SS-. Jan 21.
Original Wizard B+. ~ Apr 21.

SSS - it was incredibly interesting for me to read, I consider it an excellent work, the shortcomings do not strike my eye.

SS - it was very interesting for me to read, I consider it a good work, some shortcomings are striking.

S - I was very interested in reading, the work may be shit, but I was interested in something and did not want to pay attention to the shortcomings.

A - it was interesting for me to read, I think the work is at least normal, there may be many flaws.

B - it was interesting for me to read, it may be shit, there are many shortcomings, but I ignore some.

C - it was a little interesting for me to read, I think the works are shit, there are a lot of shortcomings.

Estimates can be corrected and specified. The meaning can be distorted due to translation.

Although imo the most correct classification would be: what I finished reading was interesting to me at that moment, and what I never finished reading was not.