To me, it would be a blatant display of not giving a fuck about "the people", and all about personal, political ties if that's what Obama decides. I have NEVER heard anyone speak favorably about Biden, no matter what their political party affiliation is. The role of Vice President is usually marginalized by the public, because rarely does the country need to utilize his role. If something were to happen to President Obama, the VP's role becomes of utmost importance obviously.
Do you want Biden running the country?