Now that I have children there is no way I would go back even though there are things I would like to experience again or do over. The odds of being able to have the exact same kids again would be astronomical. I would miss the ones I have too much to risk it.
Now if this was before I had kids I would jump at the opportunity. I feel I could relive life and get a pretty good approximation of what I have now while fixing a few mistakes along the way.