Torpedo loadout combinations?

[Paul Riley]

As new torpedoes become available later in the war it gets a bit of a challenge trying to work out your best loadout for the patrol.
Personally,I still like to use the early steam torps as the speed is still a winner,but the bubble trail is not.Electrics are good for stealth,but their speed can be a bit of a letdown,not to mention their depth problems etc.
In my last patrol I was engaging a convoy in both day and night scenarios,so naturally this would be a consideration,and you would want to take torps for day and night respectively?,both steam and electrics.I also had a great opportunity to sink a light cruiser towards the end of my patrol but had no torps left,so maybe you would want to take two of the newer falkes for this job?
I am very interested in what some of your loadouts might be,and why you want to use that loadout.In other words,what conditions influence your choices?