This handle is pronounced EmZee, not Mizz. It was intended to be initials from an old handle elsewhere -- MZ -- and I typoed it.
TLDR for why I changed it: https://news.ycombinator.com/item?id=26814015
As a bonus: I no longer have to wonder if someone is talking to me/about me when they use "mz" to mean Mark Zuckerberg.