Super Tuesday

So yesterday was Super Tuesday. I was and am fascinated by the whole thing and I woke up this morning wondering what had happened overnight.
I guess I feel a little disappointed that it wasn't the decisive day that many people thought it would be. Obama and Hillary are neck and neck - like they were before. McCain is emerging as the frontrunner - like he was before.
One question I do have though is this....a lot of people I know are really turned on (in a political sense!) by Obama, but as far as I can tell there isn't much to choose between his and Hillary's policies. So, let me ask you this - particularly my American readers - why Obama and not Hillary? Is it to do with Bill?