Well, I never used to print fanfic, other than my own (there's just something satisfying about doing edits in pen and paper). I've spent hundreds of hours reading from my computer.
The last few years, I've started printing out some of my very favorites to re-read. I've got three binders full now. It's nice to be able to pick up a binder and re-read a favorite story.
I never print a story before I read it. I'm picky about formatting, so I'm going to want to be able to go through the file and make sure it's set up nicely without any weird line breaks or anything. Plus, I can read almost as fast as my printer can print, so I tend to find myself reading each sheet as it prints, which rather defeats the point of printing it out for a first reading
PJ
p.s., I've got a new method now, actually -- I've been using Gmail (anybody who wants an invitation, let me know -- pamjernigan -at- gmail.com) and Google is doing all kinds of web-based stuff these days. I've started exploring using their document editor. I can upload a fic from home, and then read it from wherever I can get access to the Internet. It's been handy, the last few days at work
Especially as it's a temp job and I don't dare save anything personal to the hard drive. But this way, I can take a fanfic break while I eat lunch.