A big positive for me is keeping some semblance of balance - it would be tragic to let the GOP have total control again, particularly due to how far right their agendas seem to be turning.
Although I disagree with a lot of Obama's policies - I do see that he is a man who will make some compromises. This tells me that he is someone who thinks about problems in a complex manner and doesn't simply just tow the party line. The issues facing us are not just black and white - there are a lot of grey areas and I feel he considers the "big picture" more than most. He's intelligent and articulate and people around the world respect him. He's good for foreign relations in many ways.
I feel also he is a strong family man and I absolutely love Michelle and the initiative she is taking to get kids healthier and promoting exercise, good diet and fighting the rampant obesity epidemic.
I get the sense that Obama feels some degree of compassion for others - a sense I don't get with Romney, Santorum, or Gingrich. Empathy makes for better policy decisions.