Character dimension

One of my weaknesses is character dimension (according to my editor who should know!) is character dimension, particularly in early drafts and particularly with my lead characters. It gets there by the end of the revision process but it can always be improved. With each book it becomes harder in a way because you are not trying to repeat character traits that you used in other books, but to a certain extent you have to. For example, a Viking warrior is going to be far more like other Viking ...