I don't stan any actor or actress. I watch a drama, finish it, then move on to the next. I rate every title fairly regardless of whose name is on the credits.
Technical stuff like lighting, costume, cgi, etc I give more leeway to low budget/short dramas. While those should be a given for high budget/full dramas.
I only rate when I've completed watching because endings are important. SE can get high ratings if it fits the story, same as HE can get a low rating if it doesn't fit.
7 is average, 8 is good.
9 above is few, so is 6 below because I don't finish the awful ones.
Perfect 10 is rare, I've only given it once.
And I'm good with any types of endings, happy, tragic or open as long as it has one. Not hanging, seasonal or westernized. I prefer my dramas with a beginning and an end.