Well, I don't want to impose my understanding of the Creator, Brahman, Allah, God or whatever you want to call it or "he", but I suppose that we do have some disagreements about that and it's fine. To me God represents the ultimate Self, the primordial consciousness which is love in it's ultimate form. I think it's both personal and nonpersonal and it constitutes everything. It's also something that transcends human thoughts so we can't really even fathom what "it" is. In the beginning the Self realized itself and it was alone so it created company and also it chose to have a dream which we all are living right now, as through that dream the Godhead becomes even more aware due to all the experiences it accumulates through all of the living beings which are the Creator too.
I do agree with the notion that this universe is dualistic in it's nature so there always has to be the polar opposite to everything as it makes the game worth anything. If there were no suffering then we wouldn't know joy. If there weren't evil then we wouldn't know what good is.