No offence to the nice, sensible Zutarians (London, EmoHaruno, etc), but one of the reasons why I personally can't stand Zutara is because so many of it's shippers base their preference simply on the fact that it "looks better". I love Kataang because it is a non-shallow ship that is based around to people whose love for each other has nothing to do with looks, and everything to do with the fact that they love each other purely for who they are (yes, I know that sounds corny x 10,000, but it's all I could come up with).
spiritual love > physical love (but thankfully post-finale Kataang has both).