I'm responding to you without reading all the other responses here. I don't consider myself an anti-dean poster; I consider myself a pro-kucinich supporter, and I've endured plenty of anti-dennis posts from deaners who don't seem to recognize that others can find that same excitement you are referring to with another candidate.
I just spent a long time on this subject on another post; here's the thread. It's post #49. I think you'd see fewer anti-dean posts if the pro-dean posts didn't so often seem to be putting other candidates down. We could raise the civility level by focusing on the great things about our respective candidates, and debating our different perspectives without the anger and without the determination to prove how silly, terrible, unelectable, dishonest, or whatever the opposing candidates are. If our guy is great, we don't have to prove that about the competition; our strengths will get the job done.
http://www.democraticunderground.com/discuss/duboard.php?az=show_topic&forum=104&topic_id=151259&mesg_id=151259