Honestly, i usually depends on the goat. Sorry to disappoint you, but I have three Nigerian Dwarves and all of them are different.
One NEVER yells ever, another yells only when hungry, usually the afternoon, and one yells each morning when the sun comes up.
But, I do have to say the really quiet one was bottle-fed from birth; so she never quite learned to communicate by yelling, haha. The other two were raised by their goat mommas and therefore like to yell.
I don't recommend a specific breed in general, but NOT NUBIANS!!!
I just recommend getting one that has been bottle-fed; they are usually quieter, friendlier, and very loyal. My bottle-fed baby would follow me over a cliff.