My $0.02: I prefer emblems that look like they were drawn by the crewmen. While I suppose there were some artists in the Kriegsmarine, the majority of the emblems I've seen have a wonderfully rough quality about them that suits both the spartan conditions of the boats and the mission tasked to them.
This said, I'd love to see a Mjollnir (hammer of Thor) emblem, or perhaps Gungnir (Odin's spear). Perhaps something written in old Norse runes, or I suppose a single rune would work.
For those familiar with Norse mythology, the Valkyrie would be the ideal emblem. Valkyries were Odin's handmaidens, tasked with choosing the warriors slain on the battlefield to join the einherjar.
Personally, I'd love to see a lighthearted emblem of a voluptuous woman with long flowing hair, holding a shining spear while riding an enormously fat horse, a'la Bugs Bunny.
