This thread is an interesting mix of opinions and reinforces that there is no VP pick Biden can make that will please everyone. With Biden's big lead, his first goal should be "do no harm," i.e., no Sarah Palin, Tom Eagleton, Dan Quayle type picks that could cause lots of bad stories. The "deliver a state" narrative is overrated because outside of Lyndon Johnson, there hasn't been a VP that you could say delivered an otherwise contested state to a presidential candidate.
Harris is the best option for VP. She's a US Senator, was a statewide elected official in California for six years before that, and was vetted by the media when running for president. A sitting US Senator typically is perceived to have the gravitas to be President on day one. That's important given Biden's age. There are not likely to be any surprises with her. She is also best positioned to balance the moderate and progressive wings of the party, because she's liberal enough to please many progressive but not too far to the left to alienate all moderate or conservative voters. I also don't see the lack of charisma and other negative characteristics that some conservative voters on here see and I don't think the polling bears out their contentions, but we will see.
On some of the other candidates:
Susan Rice -- I like her a lot, but it will be Benghazi Tourette's from conservatives if she is the VP nominee. She's also never run for office and there is a risk putting someone who has never run for any office on that kind of campaign stage.
Val Demings -- A two-term House Rep does not convey the gravitas to be President on day one. Her tenure as the Orlando Police chief is also problematic and she's not going to move the needle on the vote in Florida.
Tammy Duckworth -- She is a true patriot, but I am concerned that with her on the ticket, we are going to hear a lot about the "old man and the cripple" narrative. I am not convinced she is a great campaigner, having lost a gettable house race before getting elected the first time.
Elizabeth Warren -- The absolute worse choice for Biden in my opinion. For all of the Harris hate in this thread, the hate for Warren is 100x that. She could do real damage to Biden's pitch of return to normalcy and she will likely hurt Biden's overall margin because there will not be a big enough boost from progressive turnout to makeup for the moderate voters she is going to get.
Karen Bass -- No one knows who she is and I again have an issue with putting a House Rep on the ticket in this environment.
Michelle Lujan Grisham -- Again, no one knows who she is and I think the fact that she doesn't speak fluent Spanish will hurt with some Latino voters.