My anime list is a SUBJECTIVE list. It's based on my feelings about the anime, that's why this is not another's list, nor a 'pro' list.
10 : Masterpiece/Perfect. I think they can't be better than they are.
9 : Near perfection. These are animes in which it lack almost nothing to be perfect in my opinion (bad end, incohenrence ...). The best rate for a 20min length.
8 : Very good.
7 : Good, not average ! 7 is a good rate.
6 : Fine. It's not bad.
5 : Average. A perfect mix of good and bad things
4 : Bad. Watching them bore me.
3 : Very Bad. Arghh, my eyes are burning !
2 : Unwatchable. I need to be drunk to continue watching u_u
1 : Shounen Ai / Yaoi / Everything that I can't stand one second