My rating system: 10 - Anime with this rating are not perfect and I'm totally aware of that. But I really, really enjoyed watching it.
I probably couldn't stop watching, had a lot of feels and liked a lot of characters. 9 - Really great anime. I liked nearly every second of it. The reason why it didn't get 10 points is
that I hated some characters, didn't like some parts of the storyline or something similar. Nevertheless I loved it. 8 - Everything with 8 points or more is most likely one of my favorite anime and worth a rewatch for me. I really enjoyed it. 7 - Anime with 7 points were good, but they were also lacking something or I just couldn't really get into it. But I would definitely recommend every anime that I gave 7 points. 6 - These kind of anime get a "you tried" star. 5 - This is the middle of the scale which means those anime weren't awful, but it wasn't really my cup of tea. 4 - This was boring/bad. 3 - Everything with a 3 or a lower rating just gains some points if the animation, music or character design were actually good. 2 - WHY 1 - I don't have any words for that.