My Drama List rating scale:
10 and 9: my fave drama that was perfect for my own personal taste & mood.
8: good drama that kept me entertained until last episode.
7: good drama that screwed up the ending/the lead characters OR was somewhat missing that special "spark" for me.
6: drama that was standard OR had the potential to be good but didn't live up to it OR had many parts that annoyed me.
5: drama that was very basic OR had too many illogical plot holes to get a 6 rating.
Anything below 5: drama that was bad /a waste of time for me. highly probable I skip-watched to finish it because someone I find cute was in it OR I was curious to see how worse it will get :-)
Anything dropped: drama I tried to watch at the wrong time/wrong mood, got boring/draggy mid-way, i couldn't care about the lead characters enough to keep watching OR was simply too bad for my taste.
Movies: i never rate them.