I love the color on that Royal peeking out in the first picture. You have good taste, too, based on the Filter Queen, the Rainbow SE, the Tristar, and that nice looking Dirt Devil Broom Vac. As for Hoovers, there is a self propelled windtunnel in the back there.
I think my favourite is the Garry. We may laugh now, but it's always the weird ones that become super collectible in the future. I have yet to see one in person anywhere. I wouldn't let that out of my sight because in a few years it will be one of the rarest ones out there.