I have been an avid fan of Korean dramas since 2009, back when I was still in college. My first korean drama is Boys over flowers which I watched with the original audio and with subtitle. This is a story about a super rich boy with super rich friends and they are bullies. One mistake and you will experience hell in school and will be forced to leave.
What I like about korean dramas are they explore different genre and mostly do not stick to one cliche plot. They like to spice things up and some have twists and turns you cannot figure out until the end. I am also very particular with the way the actors act in their scenes and korean actors does not dissapoint. There are those that are cringy in their acting but most of the time, they are expert in their crafts and have undergone years of training. Not to mention the visuals Koreans provide to their audience. Some actors looks like they came out of a comic book. Korean are known to get plastic surgeries as normal as getting a haircut but a lot of them now are sticking to being natural and still are gorgeous. This visual and their story plots will get you hook in Korean dramas.
As someone who is new to Korean dramas/movies I recommend watching Fabricated City, one of the best movies out there that will not let you take your eyes off the screen for a second or you will miss important twists in the story.
Top 100 Korean dramas of all time