I prefer cropped/docked Dobermans and cropped Danes. I like both of those breeds with tails and floppy ears as well, but I like them cropped a little bit more. On Rottweilers, I like them both about equally. I used to think tailed Rotties were silly looking, but there's lots around now, so I'm used to it and like it now. Boxers, natural most definitely! I love the look of a Boxer with a tail and floppy ears. Uncropped APBTs are my preference as well. I like docked Aussies, and docked Cockers better. In fact, I don't care for a tailed Cocker or Aussie much at all for some reason.
All of that said, I never want to go through the whole taping/posting process again, so I'll hopefully just have natural dogs from here on in if I ever have another Doberman (or another traditionally cropped breed).