I enjoy anime. I'm pretty lenient on what I watch, so take my general opinion with a grain of salt.
10 - Mmm, damn, dat shit good
9 - An awesome anime that I enjoyed thoroughly through it's entirety. I may have had a few issues or complaints with series/film, but they simply don't make a big difference to detract from the great show/movie that I am concerning.
8 - A solid series/film, in which I found some flaws that may have detracted from the pros, but for the most part, I heavily enjoyed. They obviously don't ruin the anime that I am concerning under any means, so basically, a show that had flaws, but was overall quite good.
7 - An enjoyable series that I enjoyed throughout, but I may have had some major problems with it. They might have done something that might have bothered me quite a bit, but at the end of the day, I really liked it.
6- An OK series/film that had some major problems with it, but the pros were alright enough to push away the issues. Though it had some serious baggage, the anime was decent enough to be enjoyable to some extent.
5 - A completely average anime. Something that has an equal amount of Pros as Cons, to which the series was just alright. Nothing I hate under any means, but not something I'm going to thinking about rewatching in the coming months either.
4 - A boring series/film that had some likable traits, but overall, the issues in which it had ruined whatever it had going for it regardless. Though it may have had some things to like about it, I overall didn't really enjoy it. I still don't hate it, however.
3 - A lame show/movie that has no place in the anime community in my eyes. Though it may not have some qualities that gave it substance, they were outweighed by the complete trash that are the issues with it. No thanks.
2 - A piece of tripe that I absolutely disliked to a worrying degree. The only reason why it wouldn't get a 1 is because something pushed me to enjoy it, though it doesn't change how awful whatever it was happened to be. Beware.
1 - Not only did this annoy me heavily, but it pushed me to the brink of flipping shit and making me want to die. This series genuinely offended me on so many levels due to it's pure stupidity, that it's hard for me to believe it exists.
*NOTE - these can apply to Manga as well, just replace anime with Manga, :)