Ya, I learned my lesson. When I rebuild everything, I plan to only have a couple dozen or so sites on 1 registrar/hosting account. Then switch. I do have a few corporations that I have adsense accounts in, so once I hit a certain amount on an adsense account, it's time to switch. In fact, I will probably build them all up slowly at once, like 5 sites at a time per account. And using a different layout/theme for each site. No more clickbump/xfactor crap.
And NO analytics or webmaster tools for me. I think this was the ultimate downfall and the way they tracked all my sites. Someone might have reported one of my sites for forum sig spam or something, so they just nixed everything that was connected to that site through analytics code - regardless if I had truly high quality sites in the mix. What sucks is I read something about not putting analytics on any of your sites for this very reason, and I was just too lazy to do it to all of my sites.
Luckily it's not a total loss, and the sites I do have remaining make money while I rebuild.