I'll be honest, I didn't vote for Obama (didn't vote in 2008, Gary Johnson 2012 and 2016) and I've been overall pretty happy with him as a president. If I had concerns that NY was in play, I would've possible voted for him. Had he been able to run for a third term rather than Hillary, I likely would've voted for him this past election.
I don't agree with all that he did, but he helped move the needle in the direction of social progressives. Refusal to defend DOMA was a good thing. Not pursuing too much federal action on states that legalized marijuana. The ACA may be a failed program long-term, but I think the idea behind it was single-payer. I think the divisive comment is a bit unfair, but that's your opinion. I think for the first time, there was a minority person in the WH, and he used the pulpit to shine a light on racial and diversity issues. Some people, black and white, didn't react as well as they should've and that's a shame. I'm not going to put that on him, though. Ignoring racial tensions and police issues are like a bandaid on a flesh wound. Obama's presidency + social media helped pull that bandaid off, for better or worse.
Ultimately, despite the right-wing criticisms, I've found him to be a generally moderate president who always handled himself with class and a little bit of a humor. I'm happy and proud to say he was a President of the United States.