One question I have left unsettled since my libertarian days is the specific role (if any) the state should play in our lives. The natural progression of such a leftward shift from libertarianism would be towards anarchism, but I just wasn't sure how realistic it was.
I've been slowly settling into a belief that the key is to have a minimally complicated state. Along with other important attributes, such as democracy and sentient (human) rights, I think this will lead to the best outcome.