New players sometimes ask us old sea dogs what mods they should add. Maybe there could be a thread where people could show what a modded SH3 can look like.
Here's my mod soup that I finally brewed ready after some weeks of adding mods and editing menu, txt and cfg files.
The base system is SH3 + NYGM supermod + H.sie's hardcode fixes. Most of the rest you can see on the screenshots below:

The boat

Bridge

Bridge

Bridge

UZO

periscope

Recmanual + ships

F2

navigation map

navigation map

navigation map

F6

orders page

orders page

radio

moonlit night

underwater

environment
Don't forget sounds too! KB's Diesel sound and Guns are essential mood enhancers
I hope that other players show their boats as well - that would help in deciding what to try adding next