Fun, that's the word I keep on using. That's the word I worry about when other writer's scripts get too dark. Optimistic. Fun. And to be optimistic and have fun there's got to be a darkness there. I think that's a very British attitude.
One of the real dangers of loyalty is that it may become associated with certain types of group-think, chauvinism, jingoism, and thus become socially destructive in ways that many other virtues are not likely to be when they are corrupted. Nationalism and patriotism are especially prone to misguided excess.