Acting was exceptionally great except for Lee Da Hee! She ruined a lot for me because every scene she was on sucked. I don't know, maybe it's just her character or something but she was bland and boring until she proved herself worthy in the latter part of the drama. Jung So Min totally nailed it as well as pretty much everyone else in this drama. Choi Daniel was brilliant and his character was beautifully twisted, just perfectly evil. Kang Ji Hwan, do we even need to mention that this kind of dramas are like made for him?! Goofy character who knows when to get serious and how to be cool without trying. I know better revenge dramas than this but Big Man gets exceptionally high marks from me and gets at least in top 10 of my favorites! One reason is because I was totally addicted, I literally couldn't wait for another episode to come out. There were enough plot twists to keep this show entertaining but towards the end the pattern kept repeating and the show became repetitive, not to mention predictable. That ate a bit from my ratings. There were a few exceptionally flat moments when the tension kept rising and keeping you on the edge when suddenly you'd realize what was going to happen yet there was still one more episode before that thing would happen because some of the obvious things had to be done. I understand that this couldn't be avoided but it killed some of the brilliance for me. Often, in this kind of shows, outrageous things happen but Big Man managed to keep it real most of the time. I didn't constantly feel like "come on, that's so ridiculous", of course, that whole heart transplant thing in the beginning was outrageous but somehow everything was toned down. I'd say so many things in this drama were wonderfully perfect. It's a nice package which doesn't fall apart. The last two episodes fell flat for me, they lacked tension but went on smoothly and I was satisfied with the ending which fit this show pretty well. The only thing which I am disappointed with is the love part of the story, there was no chemistry between the main characters, nothing at all and I wished they wouldn't end up together. Luckily most of the time the show didn't concentrate on love though, Biig Man was more about revenge and business than anything else.