Runners are really noisy but lay lots of eggs and are kinda skittish. Also they don't fly and be really nice if raised right. WHs are big so they don't fly and are calm. They also lay a good amount of eggs. Finally Muscovites don't quack and can be really sweet but arnt good at eggs.
I hope this...
Well I'm sorta new to ducks and at the feed store they had Muscovies, Mallards and Swedish. But after research I realized I should have gotten 3 of one breed but all get along well!
Oh yah by the way I have a Blue Swedish and I heard they are really calm but mine is really skittish and I have no idea why because I held plenty as a ducking.