>If you're having to fix stuff with -f, you're going to run into trouble; try to avoid -f ever.

I disagree. I don't have much experience using git with big teams, but at least for small team where a developer usually owns a feature branch, force pushing to the branch to take into account criticism on commits can be helpful. Of course, in that case, feature branches are considered non shared.

Git own "next" branch is actually force pushed to all the time, to remove patches which didn't make the cut for example.