On the DA:I quiz - I definitely think that mages question slants it for most of us in the direction of Solas and Cole. I really doubt people in this thread would be fervently anti-mage.
On Blackwall: I liked Blackwall a lot as a character, and didn't really understand much of the hate surrounding him. I think most of us are prone to bystander syndrome and in Blackwall's shoes, would likely do nothing - as he did - in the dog story. He was a character that was written with plenty of flaws in mind. What I liked was that as we saw him in Inquisition he was always determined, always working hard to do good - I was always convinced, given how he acted in the prison scene, that he'd taken aspects of his persona to heart: Blackwall was always the person he wanted to be. I think we all have a potential to become a Blackwall, we just aren't very good at realising that.
I think his growth in Trespasser, to the extent that he wore the name Thom again, made me feel like I'd done the right thing trusting him and asking him to return to the Inquisition.