There has been quite a few Korean movies in this series, I think they have all been violent ones though. I have seen a few Korean movies, ranging from Drama to War movies. They are usually an interesting watch, with the actors really making their presence known. In terms of Memories of Murder, it is a bit too dark for my tastes.
Howls Moving Castle is similar to other Studio Ghibli movies, where is it bright and colourful, has an interesting story and relatively well developed characters. In terms of Studio Ghibli movies, I think When Marnie was There and Ponyo are my favourites, which would then be followed by Howls Moving Castle. Spirited Away and My Neighbour Totoro are good movies but there aren't my favourite Ghibli movies.