neutrality should mean hearing exactly whats on the CD with nothing added or taken away. It should in theory be impossible for kit to lack "emotion" as it should simply reproduce whatever emotion was in the original event.
However i think humans generally dont find such a sound pleasing and its usualy the kit that has an inherent sonic flaw, or excentricity that tends to find favour. Dare i mention the likes of naim.
Naim could never be accused (not even by fans) of being neutral and true to the recording. It is however great fun to listen to and highly entertaining, full of the emotion you speak of.
So perhaps the quest for neutrality is fairly pointless.
Take another example, my newly aquired focal speakers. I wouldnt delude myself into saying they are neutral, they arent. My previous dynaudios were more neutral. But the focals are more musical. They have a richer midband and airy extended treble, that although not neutral, is amazingly pleasant to listen to.
One of my old systems comrised a roksan caspian M series cd player, audiolab 8000Q and 8000M monoblocks into epos ES30 speakers. I consider that system to have been pretty neutral. It was also flat an uninvolving. I guess you cant win.
Now i just have kit i enjoy listening to, dont care if its neutral or not.