Imo top quoting, where the reply is added to the bottom of for example an email, is far superior to bottom quoting, where the reply is on top.
With top quoting you can read the entire thread/discourse in order by reading the latest email top to bottom, instead of scrolling up and down.
However, since most people and email clients default to bottom quoting, I'll have to stick to that. The only thing worse than bottom quoting is inconsistent quoting.