95% of the time when I connected to the forum, I would hit the Recent topic. From there I could quickly see new topics, and additions to topics with activity on them. I then would pick and choose which topic I found interesting, click on it and read what was new.
I can see where All Posts might fill this need for me, but I would like to only see the header, not all the content the OP started it with. I'd like to decide if I want to read it or not.