Never got around to doing this, but now that I'm here, there's one big one I've always had, concerning the immorality of Makuta Masks. The fact that all of them are considered immoral is ridiculous to me, firstly because of all the Toa in the universe, only a select few knew of the BOM's treachery (the main reason for the masks' "immorality"), and thus would not have had evidence to consider them immoral. Second, many of the Makuta mask powers aren't all that dangerous (ex. the Shelek--this could be very useful for a Toa, and it does not at all harm the person whose hearing is inhibited...also, the Crast isn't that bad--I mean, "it repels nature" isn't much of an excuse).
Third, and this one's a biggie with me, the Mask of Mutation isn't considered immoral. Think about that. It alters the body of a living being against their will, but it's not immoral because Miserix didn't participate in the Plan. However, the Jutlin, a mask that simply breaks down nonliving matter, and which would be useful in many situations (breakouts, pursuits, etc.) is immoral because Antroz was evil. Seriously?
Fourth, plenty of masks that aren't immoral are far more dangerous than the Makuta Masks (i.e. the Komau and the Kaukau Nuva--which can suffocate someone).
So, to me, the only masks that should be immoral are: the Avsa, the Felnas, the Mask of Scavenging, the Mask of Aging, the Mask of Undeath, the Mask of Mutation, and maybe the Tryna.