What are some good things president Barack Obama has done?

I have been hanging around too many Obama-haters lately and all I hear is that he’s done nothing right and he’s destroying America and Benghazi, Benghazi, Benghazi….I don’t even know what Benghazi is (apparently neither do the people complaining about it because they can’t explain it to me, either), nor am I very political in general. I don’t know much about his presidency, but he must’ve done some good things, right? How is the Affordable Care Act (another thing they complain about yet can’t even put into words for me) a step in the wrong direction when it gives so many more people health care coverage? I’ll be eligible to vote in the next election so I figured I should know some stuff. What are your thoughts of his presidency overall so far?