Korean dramas you would advise others not to watch

Mary Stayed Out All Night, it was really hard for me to finish this drama. In my opinion it was boring. I didn't like the soundtrack and the acting wasn't that great either.

Playful Kiss, Monstar, My Lovely Girl

Muscle Girl - even if it's not a K-Drama, it has Lee Hong Ki starring. If you want to watch it for him, you better think twice, because it's awful, and it would be just a waste of time to watch it just for his sake. If you want to see his cute face, watch Bride Of The Century instead!
Heartstrings - I was so excited about this to come out, but in the end it was a total disappointment, just a waste of time!
K-POP The Ultimate Audition - same, I have expected too much from it. Don't expect too much, because you will end up being disappointed.
Baby-faced Beauty - it didn't really catch me.
Fashion King - started out great, I was really excited about it, then it turned into shit :(.

The Heirs - all I can remember is Lee Min Ho's terrible fashion sense.

To the Beautiful You
The Heirs if you're older than 20 :) (for youngers, it's fine I guess)

Playful Kiss, of course... Bel Ami wich is so much cliché and boring. Also, Dream High who didn't pleased me at all.

Big, Fashion King, Flower Boys Ramyun Shop, Coffee Prince, East of Eden, When a man's in love. I'll always advise not to waist time watching these.
If people advise to watch dramas then they can also advise not to watch dramas, there is nothing wrong with it.
1.Some people ask advice and opinion to avoid wasting time.
2. An advice is just an advice, no one puts a knife under your throat threatening to kill you if you still watch the drama LOL

So don't complain about negative advice if you don't complain about positive ones both are the same: a mere opinion.

Birdie Buddy and Mimi