often times,because i don't know what to say

Exciting cliffhangers, or i like the story but dont know what to say, and want the author know im reading&waiting&supporting :)

because we want the story is updating soon~

I sometimes leave 'update soon' because I dont know what to say. Not that the 'fic isnt good (otherwise I wouldnt even bother leaving comments) but because I find that when you've just read something, all you want to do is keep reading. It completely slips my mind sometimes that authors want constructive feedback, and it's not until afterwards that readers realise this.