The 2012 vice presidential debate was excellent on Biden's part. I remember Obama's first performance being received as medicore and Biden's strong showing gave the Obama campaign fresh air.
Sometimes I wish Biden was still a bit younger today as he doesn't always have such moments anymore and has gotten somewhat slower. That's just usual in his age, albeit the fact that he's still pretty agile and sharp for an 80 year old man.
I think Biden has become more understanding, empathetic and statesmen like in his old age. He was these things as VP, but more so.
Biden is more kind grandfatherly now. As VP, he was the fun uncle that would walk you to school and beat up any bullies.