Ha, I'd wager my hand is closer to zone VIII or IX (front and back!). I was turned off of the Zone System by an overly-ambitious instructor when I attended community college (really nice guy, and a talented artist, but he expected a little too much). I own Ansel Adams' trilogy, and I reference it all the time, but the Zone System as Mr. Adams taught it just never clicked with me.
I would submit that after several years of experience, I've learned to "go with my gut" when metering is concerned, and I'm able to properly expose slide film without too much trouble. When it comes to black and white, I'm a fan of processing normally and printing "straight". Lost detail in the shadows or highlights doesn't keep me up at night. Maybe this comes from shooting so many slides, since there's basically nothing you can do about it.