Maybe a new tag should be created for the 100% black round eyes? (Or, perhaps, the description of o o should be changed to be less strict, allowing both white and black eyes, indiscriminately, together?)
If this question is answered, post #1005090 will gain a proper eye tag; it does not have any, now.
I don't like these suggestions, for their use as discussed here is unintuitive:
o_o_(black) and o_o_(filled_in) look like they could be perfect subsets of o_o instead (based on the untrue but very intuitive assumption that o_o could be used as a tag for both white and black round eyes)
dot_eyes looks like a great alias for ._. instead; dots and filled circles are different things - they have different sizes
I like black_circle_eyes very much, as it is accurate and understandable enough. Yet, this other, big, long name would be the most accurate of all:
I think these to need to be distinct concepts (no aliases or implications). The open o_o eyes indicate shock or suprise, the scribbly filled ●_● (not a good tag name) eyes generally indicate chibiesque deviousness.
I keep my previous opinion that solid_black_circle_eyes would be a great choice, for its perfect accuracy, despite it being an excessively long name. However, now I also think that bullet_eyes would be another great choice. It's less intuitive, but it's easy to learn, and it's shorter.