It seems to be an easy question, yet I had to think... I am not really proud, it is not the feeling at all. I am writing because I enjoy it. I haven't yet established myself, there is not too many readers even though the feedback is encouraging.
One of my hubs "Understanding Religion From Sociological Perspective" (I am not giving a link because we are not supposed to advertise our own hubs in Q&A Section) was nominated for "The Top of the Class Weekly Contest". And it gets the most traffic - but I am not really proud, religion is my least favourite subject and the essay was written in 1999 for the course I was taking at DeVry. Nothing exciting.
One of my favourite, I had the most fun writing it, is "Toronto Takes Off As El Toro", it has the highest score and it is the most creative piece. Maybe "Hautism" - making fun of fashion (well, sort of).
Another one that makes me at least proud of effort - "Canadian Manifesto. How I Love to Hate You."
I would like to hope that my best hub is yet to be written. I certainly got the hang of it. Writing, I mean.