Is this a tag worthy of keeping around? It's uncommon, but it's still a rather unique aspect that a character can have.

The most common example right now would probably be the sableye species:
post #927975
post #709474

With, of course, exceptions as necessary (<3 eyes would apply here):
post #809703

Not against it (pretty neutral), but just curious if there's any other species/character/etc that possess this feature? (if only to help populate it)