About the rate on dramas I've watched:
10 -> Dramas I really love and could totally watch it again. Perfect.
9,5 -> Dramas I really love but have one or other part that doesn't make it perfect.
9 -> Dramas I love.
8,5 -> Dramas I like.
8 -> Dramas I like a little.
7,5 -> Regular dramas
7 -> Finished because I didn't want to drop it.
6,5 -> Not good.
6~4 -> Bad.
3,5~0 -> Terrible.