

I remember someone who bemoaned the lack of any good sidequests in ME3 because it was just story quests or planet scanning. There's definitely something to be said for having side quests indestinguishable from primary quests in quality.

I'm not sure ignorance of what's a core quest or not can really be a basis to claim plot non-linearity, but it can certainly be a great means of providing the illusion thereof.
