Circular means going everywhere but to the core of the issue. Implications, ramifications, parallels, precedents; everything except who should do what. Conversation, debate even, are diversions - entertainment. There are so many things to talk about over which we have absolutely no control, such as the justification of Russia's incursion into Georgia. We can only talk in circles about such things, and the good that it does is the sheer enjoyment of the exercise.
However, talking in circles about a matter that is with your power and responsibility - such as if and when you are going to get married, or buy this house or that car, is to irresponsibly evade the issue.