I don't know what I'm doing with my life. However, I love animes a lot. Now I realize that have a list helps me to control what I watch. Like a typical Twitter user, I talk about them on my TT, but in portuguese, of course.
Criteria that I use: liking the anime or manga and/or impact. Nothing beyond that.
I use tags to "tell" a personal opinion about the anime itself in the list.
If I use a 10: OH MY UFCKING GOD I LOVED THIS A LOT GO WATCH NOW FELLA (but MAYBE I've watched only one time, so it's a lottery).
If I use a 8-9: Ok, I liked this a lot, it's good.
If I use a 7-6: Oh, what I'm doing?
Below 6: I really suggest to you to watch, but I don't know if you will like this... Honestly I hated and I desire to forget this. Just a tip.