I am one of those hypocritical photographers who espouses the good sense of using a tripod to obtain sharp clear stable images, but who also seldom uses one. I realized that one of the reasons I don't use one is that I value flexibility, spontaneity and the ability to move quickly and decisively as the situation may require.
Recently I read an article that helped fill in the other part of the equation as to why I don't often want to use one. I thought that it was a sensible article and one that might resonate with other photographers with a 'tripod aversion'. Here's a link the the article in in its entirety.
Photo credits: Lightart.