I really like AO3, but as long as a fic isn't posted in tiny, tiny parts, I'm happy. My big pet peeve is long fics that have been posted in 1K parts. It really breaks the flow of a story if you have to stop and klick on a link that often. Breaking up a long fic in some parts for LJ posting doesn't bother me.

I just hope that people that are posting fic to other places than LJ continues to post links to their stories on LJ so I don't miss out. ;)