Five hundred years ago, the Korean writing system was specifically designed to be easy to learn. Similar sounds are written with similar characters, and related with consistent patterns. Some characters are actually pictures of the way your mouth pronounces them. Seriously, check out this video:

Xidnaf – World’s Easiest Writing System: Origin of Hangul

Many years later, the Korean keyboard layout seems to have been designed according to the same philosophy.

Consonant–vowel split

First, the left hand takes all the consonants and the right hand takes all the vowels. You can’t do this with English, but you can with Korean, because it happens to have a similar number of consonants and vowels: 14 of each, not including combinations.