First person past, I guess. Although I'm also fine with first person present, and third person past. (Third person present generally feels weird to me for some reason.) But yeah, if it works with the voice and the story, I'm all for it.
Although, having said that, I usually hate stories which are solely in second person. Hate them hate them hate them. But yeah, it's very much a personal thing and don't let that stop you writing them, if that's what you're into. For me it all feels very pretentious and like I'm in primary school playing make believe with some really bossy kid who wants to shoehorn me into the game when I don't feel like playing, and then tells me everything that my character does. If you can make a story entirely in second person work, you're a genius. I'm yet to read one which doesn't make me want to hit the writer and all the characters in the head.