@Mars: Boys Over Flowers, it had the most toxic male character I've ever seen. Add to that a female lead that's basically a damsel in distress and who isn't affected by anything that happens to her (unrealistic) and you have a mess of a show.
@Amanda Blacksmith: unfortunately I haven't seen any of the ones in your plan list, so I can't recommend what not to watch from those.
@3GGG: Trust me... don't bother with The Heirs if you didn't like BOF... it's basically a worse written male lead who is abusive and controlling towards the female lead. I could barely sit through 6 episodes.
Also, The K2... I say this as a massive Ji Chang Wook fan but if it weren't for him, I'd have steered well clear of the drama. Watch it for the action and the villainess but don't have much hope for anything else. I looked forward to the premise but it honestly has some of the most appalling writing and logic (plus forced/unnatural chemistry) I've ever seen in a drama...
- I am Your King The Series - I literally watched this two days ago. It's short and it isn't the worst thing you'll ever watch but it isn't actually good. A lot of it doesn't really make sense and doesn't actually get resolved. I think there is supposed to be a part 2 so maybe it will be slightly more worth watching then but for now you're better off just sticking with Make It Right The Series, which is also on your list and also isn't great but is definitely better.
- Karn La Krang Neung…Nai Hua Jai - I watched like three episodes and was bored through all of them.
- Flower Boy Ramen Shop - worst of the Flower Boy dramas. Some of the plot developments just didn't even make sense. Don't bother with it.
- Introverted Boss - Couldn't finish it, it was so boring.
- Boss & Me - I finished this purely out of stubbornness and let me tell you only the last couple episodes were any good. Don't bother. I loved Love O2O and trust me this doesn't even come close to that.
.When a Snail Falls in Love - I made myself continue this until ep 11 and then I was like..why am I doing this to myself. It's pretty boring and the guy always outsmarts the girl, she's supposed to be smart and all that but it almost doesn't seem like it because she's always one step behind, maybe that changes later on, idk, I just found it boring overall.
.You Drive Me Crazy - The girl pissed me off SO MUCH. It had some cute scenes and all but wow, if I could go back in time I wouldn't have watched this, and I didn't really like the ending either.
.Save Me - It was "ok". It got really boring later on imo, some situations never seemed to resolve themselves so the eps seemed kind of slow because the same stuff kept happening, maybe if this drama had less episodes it would've been better. The second male lead was more charismatic then the main male lead.
.Rich Man - Really boring and it's really cliché. I don't think the main girl acts well.
.My Lovely Sam Soon - I hate this drama with a passion, second worst drama I've seen in my life. The guys is abusive af, they keep fighting and there were some stuff the male lead did that I wouldn't forgive if I were she. And the female lead is not the best either, she's annoying. The ending was disappointing as well. Really not worth it.
@Chrystal
Jugglers | pretty unremarkable overall. Not too funny, not too romantic, not too dramatic, not too engaging. It was just meh. There's so much better out there so I would skip it unless you ran out of things to watch.
Missing you | the first half of this one (story when leads were kids) is amazing, second half fails to deliver the same emotions. It gets pretty messy later on, which made it a struggle to finish it.
Boss & Me - the plot of the drama is basically entirely "girl isn't sure what guy is thinking/means but never actually asks him." It's extremely boring. I wanted it to be as good as Love O2O but honestly I literally finished it out of pure stubbornness, I'm not sure I've ever skipped through more of a drama.