indifferent

Having no particular interest or concern; apathetic.

Having no marked feeling for or against.

Not mattering one way or the other; unimportant; immaterial.

Characterized by a lack of partiality; unbiased.

Being neither too much nor too little; moderate.

Being neither good nor bad; mediocre: synonym: average.

Not active or involved; neutral.

Undifferentiated, as cells or tissue.