Verified answer

Michael, I think.

Though I suppose we'd better get used to all of them. Rockstar have said they won't be available to immediately swap between in free roam at the start of the game (though I'd guess it'll be pretty early on) so they'll probably be a few intro missions where we're forced to play as just one character as we get to know them.

Michael hands down.

Trevor. He's just flat out nuts

Franklin and micheal

Franklin because he's like cj and cj is the best!!