I voted DiD.
I still want to see the whole war though. I don't want to go back to Aug. '39 every time I die and see if I get further along.
So after my first career using GWX2.1/SH3 Commander came to a nasty end near Narvik in April '40, I started a new career, in a new boat, with a new crew in May '40.
I plan on doing that throughout the war so I can experience all phases of the war, hopefully with as few careers as possible.