Before you disappeared you were one of the best progressive owners out there. I'd welcome and/or invite you back into any of my leagues. I'd just hope that if you needed to bail again you'd drop a line giving at least a little notice. But I've been there before, after my wife died, I switched jobs and generally lost interest in the site, but didn't want to quit because I truly loved it and felt obligated to the commishes of the leagues I was in and to the owners of the leagues I ran. I came THIS close to just up and quitting and I wouldn't have told anybody because it just seemed easier to just walk away than to try to explain why I needed a break.
That said, even just a "hey, I need a break." would be great should it get to that point again. And like I said above, you're more than welcome to join any of my leagues again (and keep an eye out for a smail from my brother or I about a new league we're working on).