You must have watched a different guy than I saw.
His best attributes were.
1. He was "black." Being "black" gave liberals orgasms when they thought about how much they could virtue signal their non-racism.
2. He could read a teleprompter well. He didn't come across as an idiot.
3. His side owned the media-lie-system so they could give him billions of dollars worth of free political support.
Beyond that, he wasn't impressive to me. He didn't have the raw intelligence of a Thomas Sowell or a Walter Williams, he was just mediocre.
Both are ignorant and arrogant.
Obama has confidence.
Harris is a nervous chihuahua.