It's difficult to gauge that. With a bad guy you just know you're bad. To play a nice guy is harder - unless you are a very nice person like me of course.
I went further and further back through the centuries to get a sense of perspective but now at least I understand why Irish history evokes such strong passions and emotions.
Although this is a fictitious story the history is real. You don't want to re-write history but you certainly want to portray events and characters as realistically as you can.
