I usually follow Goodreads’ rating system in rating books that I’ve read:
“it was amazing”
It was utterly wonderful! Totally incredible! Definitely amazing! Some of the books that I gave a five-star rating ended up as my favorite.
“really liked it”
It was awesome, and I really liked it so much! I had a great time reading the book, and I enjoyed my reading experience.
I liked it, but it was just an average read. Not too good and not too bad. Or I was just feeling nice at that moment to not give the book a two-star rating.
“it was ok”
Either for really average reads, or I-don’t-know-how-to-rate-this book, or I was just really okay.
“did not like it”
The book was totally meh. Perhaps the writing style isn’t my thing, or the plot failed to entertain me, or the overall content of the book was really ridiculous. I rarely give a one-star rating, but when I do, it means that I really didn’t like it.