I am completely in favor of everyone doing this (especially the longer fics) because the ones who don't are the ones I have to open one chapter at a time and C&P into an email, which is just fucking annoying when it's 13 chapters and, also, sometimes takes so long that I'll skip until the weekend or something.
Also, if you're worried about missing comments, don't be. When I email a pdf it will, of course, have the author's name on it and that makes it easier for me to find it and comment. Whereas when I have to email everything to myself it just has the title, so half the time when I go to comment I can't find the fic and, thus, a comment doesn't happen.