Korean is the easiest of the three to type on computers and its language (hangul) doesn't require chinese characters (hanja). They are still used for some family names and formalities, among other things, but you can communicate much more easily in hangul (without using hanja) than the Japanese can with only kana (and without kanji). I am a korean-american who knows a little Korean and I'm currently studying Japanese because I plan to go there and teach english after I get my bachelor's. The kanji aspect makes Japanese much more intimidating but I personally think it is much nicer to listen to than Korean.
I'm not too familiar with Chinese linguistically. I think the characters are amazing but often convoluted.. I have terrible english handwriting. I suspect if I started drawing Chinese characters I'd appear somewhat handicapped to anyone who could read Chinese.