My Drama List rating scale:
10 and 9: my fave drama that was perfect for my personal taste & mood.
8: good drama that kept me entertained until last episode.
7: watchable drama that was overall good OR drama that was an 8 rating until it screwed up the ending/the lead characters at the end.
6: drama that was standard for its genre OR drama that had the potential to be good but didn't live up to it.
5: drama that was very basic OR drama that took the viewers on an illogical ride.
Anything below 5: drama that was bad/a waste of time. 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 that got boring mid-way, i couldn't care about the lead characters enough to keep watching, OR was simply too bad to even skip-watch until the end.
Movies: i never rate them.