Hey there
I love some vacuums because of their color too, but I still can't bring myself to love really awful vacuums, no matter their color. As an example, I love my Eureka Smart Vac because it's Purple, but if it was the gray or hunter green or teal one, I don't think I'd love it as much.... still a good vacuum though and I do love it for more reasons than the color, but that makes it so much better.
I've even thought of organizing my collection by color instead of brand, but then I'd be mixing brands up, and I wouldn't know whether to go by the color of the motor housing, bag, or handle.... they aren't all designed so the the entire machine is one solid color.
Modern Kenmore canisters are still powerful, but very fragile. I've had experience with several used ones, and the plastic is just so flimsy. It's almost a given that the power nozzle wheels are going to fall off.... quite often, the height adjust and handle release pedals are broken too..... I've *almost* bought 5 different ones from Craig's List over the years, but they all had at least one of those parts broken. I have a friend who has three, and they all have at least one of those parts broken.... two of of them, it's front power nozzle wheels. The latest Kenmores have gotten a little cheaper on the dusting brushes too.... and I've seen a few instances of the switch in the hand grip breaking. I don't know what's happened to them lately.... I assume Panasonic still makes most of the high end machines.... we never saw issues like these when I sold them for Sears back in 02 and it really saddens me that machines costing as much as they do have gone down so drastically in quality.