It's not where my brain goes, but it does make sense, and I'm super interested in where I'm finding differences. To me it looks like it comes down to deciding how normal death in general and killing in particular has or hasn't become for him, and how he understands the world works (as a place where death isn't special, maybe), and how much he relates to the world or not. I guess I also like the idea that his going after his torturers and following through isn't at odds with his humanity, that having both isn't a divide-by-zero error.

For me, I guess I'm not imagining Bucky going through with it for revenge or satisfaction, too. It's not about wanting so much as justice, for him: You don't get to do this to me, and the years since you did this to me don't mitigate what you did. I'd be interested in a Bucky who accepts that his choices are going to make people really uncomfortable, apparently. Headcanon party! Everybody should write the thing that intrigues them.

I mean, also, for him it hasn't been 70 years; we don't know how long he's been awake, but probably not more than five years, say. Longer than he was in the war. I guess you also, as a writer, make some decisions about what his moral and emotional baseline is, whether it's pre-war or pre-WS or what. All present intriguing possibilities!