I consider all of them to be pretty awful, but I do have a soft spot for the older Dysons, mainly because I thought they were the coolest thing when I was younger, and I always wanted one. I kind of want a Dyson DC07 as a "guilty pleasure" vacuum. I know Dysons are awful, but it would be cool to live out my childhood fantasy of owning my very own "big boy" Dyson. My picks for the worst Dyson goes to the Cinetic Big Ball and the Dyson V10.