This article says that, upon further questioning, the miners admitted that the fight over who goes last was not about wanting to wait until everyone else was safe. Rather, it was about wanting the world record for longest time trapped underground.
On a serious note, I wonder if anyone has volunteered to go first, essentially be a guinea pig.
Other articles have noted that the men requested a lawyer to draft a contract that all proceeds from future movies and books be split among them, and another document agreeing to not publicly discuss what happened in the 17 days before they were discovered.
With this many miners involved, I smell a lot of future battles among the miners and also among the miners' families.