I wasn't sure how to vote, because most fics only take me a 20 minute break to read. So I don't find it all that difficult to find a block of time where I can read a whole fic at once. The longest fic I can remember reading online is Labrat's "Masques". I think it took 2-3 hours one Friday night, curled up in my chair with my laptop.
When I like a story, I don't like to stop. That's also the reason why I've read practically everything on the archive--up until recently when I stopped reading fanfic almost completely. But I'll stop if I have to!
