American English because that's what I speak.^^ Haha. I actually heard somewhere that American English is closer to "traditional" English. Just something I heard.^^ I don't have a source so take it as you will, haha. Not that I think it matters; to me, English is English.
As for accent... well, I don't think I have one, haha, but other people in the US would think I do, haha. I live on the West Coast, so we generally have the most diluted accent out of all the regions.