So I have ignored loud 1 on my privateer, but now he has leveled up a bit to get loud 2. Should I train my privateer to get loud 1 and 2, or is it better to be less of a threat?
Depends on how durable your companions are. If they normally last the entire fight then maybe you don't need to train it... but if you're losing any of them on a regular basis it might make sense to draw more attention to yourself. I don't know off-hand if it applies but some future ability may require Loud as a pre-requisite although I guess it doesn't matter... if you run into one that does require Loud you could always just add it at that time.