Truthfully, id like to do U-64, even though it's life was short lived. Because it was the first IX uboat of the war. (IXa aside) I think that symbolic. I also think my last type9 career should be the first one that appears in SH3. Would take me a LONG time to complete too. Only reason i don't try that is a silly one.
I don't have its insigna.

Id try and import it, but any job id do would be super amatuerish and it would look like crap. So ive limited my boat selection to insigna's in existance.