Two reasons why President Kerry will be better than President Clinton.
1. He's already shown excellent judgment by picking Barack Obama as the keynote for the DNC. That was a bold move. At the time, Jim Edgar or Jim Thompson could have gotten in the race, and Barack might have lost. It was not the lock that it is now. And what a better pick that Clinton's keynotes: centrists like Evan Bayh. His choice of a real progressive is a great sign for his Administration.
2. His background as a legislator means that he's more likely to listen to others than the background of executives like Governor Clinton (who tend to make their decisions without a ton of input).