The most unrealistic thing for me is that apparently when the main lead (male or female) needs to rush to there loves side they for some inexplicable reason seem to forget how to drive or get a taxi and therefore have to run across a city to get to them just in the nick of time!!!
hot young rich CEOs falling for plain/ordinary main character.
poor characters have expensive phones and nice trendy clothes
I always see people in video comments complaining about the new phones xD

But if it's samsung, it must be not that expensive for Korean dramas no?
The way some of the female leads eat without getting fat.  Haha

I live in NYC and run into people I know fairly frequently for a city of its size, so I'm not going to write that one off as unrealistic for me. For me, the most unrealistic things are:

Amnesia and the frequency of it.

Birth secrets (I mostly avoid dramas like this, but sometimes they sneak it in)/

Chaebols falling for poor girls constantly.

How often characters killed in dramas are hit by the white truck of doom

 KatelynnBrooks:
The way some of the female leads eat without getting fat.  Haha

Let's Eat is a GREAT example of this! haha

 Eliza:

This!


Even when they're supposed to be wanting town! They just know their damsel is in distress! Lol

 Joy:

Let's Eat is a GREAT example of this! haha

No kidding

Right.  The amount of times a guy can say something effed up and be forgiven.  Nooooo don't let that go...

My hot criminal hubbies always getting caught?
Recordings and CCTV always existing, and in HD??
People getting worried for random neighbor if not seen in like what?? 2 weeks??

 LinLin:

My hot criminal hubbies always getting caught?
Recordings and CCTV always existing, and in HD??
People getting worried for random neighbor if not seen in like what?? 2 weeks??

Yes!  Damn CCTV. BUT it's only there when convenient!

For me ACCIDENTAL KISS ... that's why I hate it so much, that's impossible.

And people hit by a car, and the car just keep beeping before hitting , maybe the driver doesn't know there is something called BRAKE in cars.

 jinnborn:

For me ACCIDENTAL KISS ... that's why I hate it so much, that's impossible.

And people hit by a car, and the car just keep beeping before hitting , maybe the driver doesn't know there is something called BRAKE in cars.

Agree on the accidental kiss... how come people always fall on some hot, single opposite-sex person and always end up on their lips?!