You should understand that leaving kudos is what I do when a story has left me incapable of telling the author just how much I liked the story and exactly why it is awesome and deserving of fame and praise and all the great good things.
I left kudos on your story because you rendered me incapable of thinks, is what I am saying. Kudos generally means I was just sitting there flapping joyfully at the screen when I got done reading.