Most of the time I sit at the navigation map cruising at x256 TC with the gramophone playing. (300+ tracks will keep you entertained a
LONG time btw) Keeps a nice balance between boredom and entertainment.
If we had the U-boat interiors fully modelled, that would just be awesome. Even if we could only jump from one room to another (As opposed to being able to walk around and explore... Actually that's what I originally thought we'd be able to do when I first got SH3), it'd still be great to see the rest of the boat.