my rating system (very simple & subjective)

10 – Everything’s spot on & is one of my favorite ones that I would re-watch over and over again.  

9 & 9.5 – Extremely enjoyed it though there might be certain aspects that I found lacking or not to my liking, but still a great/memorable drama + would re-watch it any time.

8 & 8.5 – Liked it a lot & had its enjoyable moments. No crucial flaws but nothing mind-blowing either. + could probably re-watch it if i wanted to for some reason.

7 & 7.5 – Was good, but wouldn’t watch it for a second time.

6 & 6.5 – Average. Didn’t keep me interested/engaged enough.

0-5 – Didn’t like it at all (depends on to what grade I disliked it though, whether it was just lame or outright crap)