I know it's really not viable, but I'd like to see a faction in Ireland. What I know of the anchient Irish is so interesting, but then I don't think they invaded other people, or had much of an army - at least not one that could compete with certain other factions.

Anyway, if you could make an Irish faction, I think the whole island would be one faction. There were different tribes, but from what I've read, it seems like Ireland was pretty unified until whatever happened in the north.