Yukkuris who have distinguished themselves with uncommon valor, selflessness and/or kindness. They are the polar opposites of shitheads.
Pictures from the "Yukkuri Family from the City (compilations)" pool were removed because mirroring the entire pool was redundant and most pictures did not actually qualify for this pool. (post #39456 Being told that your "savior" didn't actually save you and is about to kill you isn't "Nicehead" at all)
Also see the nicehead tag.