At this particular moment, I could consider most things as fluff.
Setting that aside, I'm returning to the definition I mentioned in our
original discussion: "invoke good feelings when being read".
One important detail is that fluff needn't be romantically oriented. A
tale about a child being born into a family can also be fluff. A new
friendship as them can also fall under that category.
Essentially, we're talking about a 'genre' that isn't burdened with
'darker' topics. The use of quotes here points out that I allow
certain arguing-space here.
Now, if we stick with the good feelings and whatnot, then a story
about a bunny running through the woods, doing nothing but throwing
flowers, is fluff when presented to a 4 year old child.
The fluff term depends really about the public.
Now, is "Shoes" fluff?
To a point, yes. And I'm glad it isn't complete and utter fluff, no
matter about the challenge, because it actually gives something more
than just a smile while reading it. It did invoke good feelings, but I
have those when I read Echoes too. So I don't think I'm really
qualified to judge it that way.
Serious fluff? I'd say it's possible as long as you write something
that is generally positive, with neutral parts, and nothing negative
is mentioned. Those aren't really strict restrictions if you know what
you're doing.
Again, is "Shoes" fluff? I really don't know. But it's probably the
closest thing to "fluff" we're going to get out of you. That should
mean something.
Again, I'm biased as the less "fluffy" parts of your fic jump-started
me into something that resulted in personal fluff. So that's that.