I guess with fanfic there's the knowledge that you can't get it as a real book, so reading it on the computer doesn't seem nearly that much of a problem.

True - and God knows I've spent many hours in front of the computer, reading fanfiction, especially back when I got into Spike/Buffy fanfic. Haven't read much lately - it usually goes in phases. I remember sometimes getting bad neck-aches from reading stuff for hours on end ...

What kind of fanfic are you reading at the moment?