Cheers for the replies so far on this topic

Well,I have just done a bit of planning for my 4th patrol which i'm about to embark on,and i've just finished the torpedo loadout on paper.This is my current loadout,based on certain conditions from my previous patrol
4 standard electrics loaded in the fore tubes.I found during the last convoy engagement that the attacks alternated between day and night,and I have no problems attacking in both conditions as I attack around the clock anyway.Some people prefer to attack only at night,and break off in the day,so naturally they will tailor their uboat for that.
I also put 4 standard steam torps in reserve too,as I still like to use them,and find I can still hit targets effectively with these.These then will be saved for a following night attack,at ranges not exceeding 2000m.
Towards the end of my last patrol we were spotted by what looked like a Light Cruiser (our first encounter with said class of ship) at about 10.000 tonnes,and I wished I had 2 torpedoes for that ship,but sadly we ran out.Therefore,I thought it prudent to also pop in 2 Falke Torpedoes in the fore tubes also,reserved exclusively for any high value warships only,light cruisers,battleships etc.You never know when a perfect opportunity will arise to sink some proper tonnage.And I still have not managed to sink a major warship yet in my career,other than 1 or 2 small DDs earlier in the war.
Incidentally I have not used the Falkes yet,but i'm hoping I may get the chance soon.
There are 3 spare steam torps in the external tubes,and 1 more Falke in the aft tube for emergency pursuits.This seems to be a popular choice with many of you,and having an emergency solution in the rear seems a logical choice.
I think this hopefully we give me a fairly balanced offensive capability.
Let me know what you think