Support only segment-based URLs

Before I cast a vote, I would like to hear arguments pro vs con for eliminating the query string url ability.

My preference is the segment based url, but that is because it simply makes more sense in an MVC framework.  That being said, is there an argument to be made for using query string urls?

I'm not saying either url format is good or bad, so I don't want to be the subject of a flame war about this topic.  What makes sense?  Are there situations where query string url format is better than segment based?  If so, why do you think so?  If not, again please tell me why you hold that opinion.

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