My current TV addiction now that House, as one wit said, "has the shark swimming around in its tank", is The Good Wife (TV3, Sundays 10:25 pm). I've no idea how close it is to the reality of a large corporate law firm (though it must be closer than Boston Legal) or whether the election of state's attorney is really as big a deal as they make out. What I enjoy are the intricate webs of conflict, as every single character struggles to gain and consolidate status and power.
As a cronic conflict-avoider myself, I watch in a kind of fascinated horror as the power plays and one-upmanship unfold, even between characters that are broadly speaking friends or allies. One thing I've learned later in life is that conflict is unavoidably woven into the tapestry of human existence -- and that this isn't even necessarily all bad. But I guess I get a kind of carthasis watching a depiction of American big city law and politics, much more highly-charged than anything I'll have to deal with (I hope).
My guess at a general theme would be something like: even those who want to be moral, must also learn how to be ruthless.