♥ = ok! (this one heart means the drama was good. Yet, It wouldn't be likely for me to watch it all of a sudden if I was bored and decided to re-watch a drama)
♥♥ = Like! (These two hearts mean the drama was fun & entertaining. It also means that, after a while, I would probably watch it again -but maybe skipping some parts)
How do I choose the one, two or three hearts? Well I take into consideration the acting (did the actors in characters convince me? was there chemistry?). Setting (is the scenery according and believable? does it make sense chronologically?). Originality, or should I say creativity? (how different were the scenes and actions for a recycled plot? how many drama clichés were there?). Plot (is it complete or does it feel rushed? does it have a good pace? does it have many -unnecessary- conflicts? Were there any surprises or was it all predictable?). Music (does the music go according to the emotions or does it feel awkward and out of place?) and such.