I still play Silent Hunter 4 almost everyday
I tried a lot of mods and when it comes to the big mods i'll always end up back at TMO 2.5
I also added the no trembling mod below the water
Changed a lot of sounds myself
A few from SeaQuest, Crimson Tide and Battlestar Galactica
The way Gaida says action stations is brilliant
Then i have installed the Typhoon which is one my favorite submarines (thank you jhapprich

) I added a few 100 extra targets to fire upon during my pimped campaign
The fact that you can change so many stuff in this game keeps it interesting and new.