I want to binge watch some kdramas where the main character is either a genius or is exceptionally good at something. 

Examples like I Remember You and Good Doctor. 

Guyssss help me out here :D
Dr. Frost... Lately all my replies have Dr. Frost in it! LOL
doctor stranger .............. its already in ur list
i can hear your voice ............ not typically genius . the main lead has ability to read thoughts
love me if you dare

Is it a good drama? I've seen it before but didn't want to start it in case it actually sucked xD
Rich Man Poor Woman. Oguri Shun's character is steve jobs kind of genius. Hope you like it :)
@Donna mention which drama u r talking about
Hey,

Here are a few posts that might contain what you're looking for:
Genius Male/Female Leads
A Genius Male Lead
drama involving female genius?

Hope it helps!
Just finished Love me if you dare. OK not Korean *ahem* but a very good watch if you can stand listening to Mandarin. It's honestly brill and along the lines as I remember you
Missing Noir M is a really good one. :)