Personally I think this one is absolutely one of the best, with just the right amount of angst and fluff- or I'm hypocritical because I love the art style too much
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Shounen No Kyoukai