I spent two good work hours on trying to decide who I like best for Kerry's VP. Thanks Amos for the Ontheissues link.
I still think that a Kerry/Bayh ticket is probably the most electable, but if I am correct in thinking that we can still win this election by choosing the best person for the VP job, it would be Kerrey. So in summary.

Most Electable - Kerry/Bayh
Best team to govern - Kerry/Kerrey
Most interesting team - Kerry/Nader

Surprisingly, after going through the whole ontheissues site, I agreed more often with Kerry than any other politician. I'm glad he's our man.