I think Korean is a cute sounding language. It makes me want to learn it. However, nearly every word I've learned by watching dramas I have heard wrong. I still want to learn, but I think it will be hard.
I'm sorry I heard as bianhe
Really I heard as chincha
I like it I heard as chuhuahe
As for words I like (probably horribly misspelled):
When a guy says hyung poutily it's cute, but a girl saying oppa poutily is nearly always annoying to me.
Aigoo/aish/omo
Wasoh -you came
Opsoh -there isn't any
Kachi kajah /kajah- let's go. This is always soo, cute sounding to me :)
Andeh-you can't
Nomu nomu nomu
Shiroh- I don't like. Again, pouty is cute :) I think of it as the Korean equivalent of 'I don't wanna' or sometimes 'DO NOT WAANT!!'
I also think the polite endings are cute. -mida in particular
Or when they add -yo late because the person is glaring at them for being informal