Type VIIC/41 for me,IF I live long enough to get it,its the pinnacle of typeVII design and snorkel equipped its all you need to get you through till the bitter end,I'm afraid I don't really count the TypeXXI,only a very few saw front operational service and only one made a real(dummy)attack on an enemy ship so even when I use it its only as a fantasy senario,what if?:hmm: missions if you like.The TypeIX class of boats are really good early on in the war but later they're bulk plays against them to a certain degree,as more aircraft come hunting you you need to dive that much quicker and more often

My favourite TypeIX boat would be the IXC/40,you have the range,firepower and the extra depth abilities,all essential for your typeIX career

as for the TypeIXD2,as someone has already its an underwater death sentence,it may be quick on the surface,but when it comes to diving or trying to manoeuvre the beast underwater you are thinking in glacier like speeds

its extra eels just can't be justified as a an acceptable payoff for its sluggish handling,and for that reason,I'm out


Just my humble opinion