I chose it cause it was the first one I came across that made sense.
Why do I stay? *grins* - I like the interesting differing points of view -even when it seems like I'm arguing, I'm not - I'm learning!. (errr...and earning!)
I enjoy the ability to impart my knowledge in a way that I can get feedback...and learn from those who have a little more knowledge, or knowledge in different areas of the same topic at the same time.
But, I've come to the conclusion that due to the high emotion stuff I tend to wander into - controversial topics, arguements/discussions etc - I need to take some time away - focus on other goals at present (fertility treatments etc).
So hubpages is both interesting, enlightening, and occasionally a little over the top - would I change it for anything. Nope.