Writing in the first person is different, that's for sure. I did it for one of my shorter stories, and it seemed to work - and that one received more comments than any story before it, which is the gauge I use. When the Forgotten Man story started to develop in my head, it just automatically lent itself to the first person. Similar style to my earlier story also. But such a different mindset, so yes it can be a challenge. And why not go all out?