I'll go first:<p>Personal: 2<p>Work: 0<p>EDIT: This is atypical- I'm usually around 8/3, & no more than 12x in either, except for relatively rare occasions.
I use the accordion method. I let my inbox fill up, and then at some point it gets out of hand and I take drastic measures to bring it back to zero inbox.
Work: 53,589. That represents two years. This is due to a bug in my mail system that prevents me from automatically deleting messages.<p>I only commit read mail from external senders and ~20 whitelisted people. Other people iMessage me if they need to get to me.<p>Home: 300. I purge weekly.