Used to be that geographical balance was more important. But bush had Cheney and both were from mountain time zone ( I think).
Now, I don’t think the vp choice is terribly important unless you pick someone with lots of negatives (palin).
I think mccain would have won if he picked someone from Florida and I think the same is true with al gore.
I think McCain was persuaded to have that clown on his ticket. I could have voted for him if I didn’t worry that dumb-dumb would have regular access to the a White House. Of course, we now have a catatonic sock puppet lapdog in that position, so...