• Pass health care reform
  
• End war in Iraq
  
• Kill Osama Bin Laden (Ok. He didn't but during his presidency, his workers did xD)
  
• US auto industry got better
  
• Much lower unemployment rate than during Bush (by literally half)
  
• Made America the super power again (after Bush being a silly image overall though Bush was pretty decent as president too -.-)
  
• Pushed many leaders to be more green
  
• Made America seem more diverse just cause of his racial color (and also a motivation)
  
• Got the nobel prize for a really really... unfair reason but ehh
  
• Die school for profit schools! He did a lot on destroying scamming colleges (there are still many out there but still xD)
  
• Helped South Sudan gain independence
  
• Made Wallstreet less powerful with reforms
  
• More support for veterans in war
  
• Better food safety
  

• US debt like never before...like literally (but this was necessary to make up for unemployment rate -.-)
  
• Health Care Reform not as well planned as uhmm..... budget problems :/
  
• And some other minor things I don't really care
  

Added (15-Sep-2015, 8:46 AM)
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Putin saved Russia Yes. As he is a good man as President does his job 100% in that time i dont see normal president who dont fear do better for our country . That was before the President is simply fear. I do not know where I lived now and what it would be with Russia , but words just can not describe . . But at this stage of development of external and internal policy of the Obama support the residents? And what would you now like to fix? or may be new pretendent in white house?