Thus said "PJ Hunt" :
I'll stick to this type of posting unless someone can explain why it's
better to repost the entire message at the top of my reply.

It isn't. If you're too lazy to edit the quoted content to include just
the relevant portions that you're replying to, then by all means don't
bottom post.

You could top-post, but better still, just don't post at all. There
are plenty of other posters who value the reader's time enough to edit
properly.