I never thought I'd like paring with Flitwick but well this kinda changed my mind lol. - What a compliment! Thank you so much for that, and for taking the time to comment. :-)
And yes, I really wanted to move the story out of the typical motivation for Death Eater/non-Death Eater love stories and into a more complex realm. Most of the people who joined up with Voldemort weren't pureblood "true believers", so they must have had a different reason for it. Finding those motivations is where the interesting stories lie, imho. And while my Dolohov had issues that might have manifested themselves later, if my Filius had chosen differently, it's hard to imagine Antonin ever joining Voldemort.