Warrior Baek Dong Soo - Dong Soo was boring. Yeo Woon was less so, but the drama itself got so boring that it hardly mattered. Lost potential all around. King of Baking, Kim Tak Goo - Yeah, Tak Gu was boring too, and annoyingly plucky on top of that. Ma Jun was relatable, if angsty. Time Between Dog and Wolf - second lead was just way more likeable for me. Although I'm not sure any of those really needed a drama based on them, haha. WBDS could have been written from the other perspective, though.
It wasn't SLS anymore in Cheese in the Trap, it's just that In Ho was a better character than Yoo Jung, but the drama/webtoon is about Yoo Jung's troubled personality so it can't be helped that he is the main lead.
Harry in I Miss You, it would have been a better drama if it was told based on his point of view. Jung Woo is a coward and childish. It's plain annoying.
Cheese in the Trap! I don't know if it was because of the contract conflict they had with the Park H, or that I just liked Seo Kang Joon's character more, but that is one of the first dramas that I wish they had filmed an alternate ending.
I almost had SLS for the drama Substitute Princess but because of the overwhelming response of the viewers the story line was actually changed so that the lead ended up with the original second lead. The drama was kind of a mess but it was still interesting.
Who are you: School 2015 has one of the greatest second lead syndromes. Not that main male lead was bad but Yook Sungjae performed better than show producers expected which resulted to interesting character in drama and big SLS for everyone watching :D
Who Are You: School 2015 The Heirs Goong Warrior Baek Dong Soo Chicago Typewriter King of Baking, Kim Tak Goo Pinocchio Sassy Go Go She Was Pretty Sungkyunkwan Scandal To The Beautiful You My Lovely Girl Cheese in the Trap 49 Days (?) Reply 1988 (?)