I would agree that we change pretty dramatically when we get sober, mostly for the good though. I would say that while the change may have affected your marriage, you need to view the marital issues as a completely separate and distinct issue that you need to address. Just like some of us have underlying psycholocial or physical issues that need attention. Quite possibly you were ignoring some of them while you were drinking, or trying to avoid them by drinking and they are just now becoming obvious. The simple removal of alcohol from the equation in itself won't solve every problem, perhaps you could ask your wife if she'd like to discuss the issue with you? Or perhaps even consider a counselor if you can't find common ground to begin?