My ratings are based on my overall enjoyment, though I try to include some sort of objectivity to them. I also rate shows as a whole, meaning that i don't have separate ratings on different seasons. There are exceptions to this when one season is significantly worse/better than the other. (Example being Suzumiya Haruhi no Yuuutsu where the second season was a lot more boring due to endless eight). I also try to keep my scores so that they can be compared to one another. This means that i tend to update old scores to match with the new ones. Also, I do a lot of research before starting a show to see if it's any good for me. This is why I haven't used the lowest ratings. Here's shortly what my ratings stand for:
10: This is what i call a masterpiece. These shows have barely any things to complain about and most of the time they give some sort of important life lesson and are otherwise relatable. I highly cherish these shows and they'll always have a place in my heart
9:Like the ones above, i cherish these with all my heart. Very few things to complain about and i had a blast while watching them. These are close to a masterpiece but most of the time they lack that "something", a certain feel that makes them a 10
8: I consider these shows to be "Very Good". They might some some elements that I did not like but the enjoyment is otherwise very consistent. These shows are also quite memorable which makes them better than just "good"
7: 7 is a "good" show. Pretty self explanatory. This is where the flaws become more apparent but overall they leave a positive feeling.
6: My opinion about these anime are a little mixed. I can't say that these shows were good, but they were slightly above average. Sometimes these they do some really good stuff but then fails to keep it up.
5: 5 is a mediocre. I don't like the show nor do I hate it. These are the shows that I watch just because i'm bored. They might keep me entertained but otherwise there's really not much going on in them, at least for me.
4: Here below average we have the anime that made me feel a little hate towards the show or just flat out boredom. These are not necessarily bad, in fact, they did at least something right since they are not graded below this one.
3-1 I bundled these together since I have yet to come across a show that deserves these grades. And to be honest, I don't think any title is as bad as 1. They all have at least one thing, even OP or ED that ranks them higher.