Of course I also change font - using FR conventional <i>
italics<i> - and also <tt>
teletype font without or sometimes <b>with boldface<b>/<i>or with italics<i></tt> to distinguish the voices of various posters or authors I'm quoting.
I also use <blockquote> quite a lot to augment the font in distinguishing between voices. I think it makes posts more readable and more inviting to the eye.