Why would Favre choose Minnesota?

Why would Minnesota choose a 40 y/o QB that was overrated in the first place(a "great" QB doesn't throw as many INTs, let alone at the big moments, as him)? Anyway the Vikings play in a Dome, and they have a RB that will take some of the pressure off him. He doesn't want to be on a team that counts on him. He wants to be on a team that will carry HIM. Yeah he got the better end of the deal, but blame the Vikings for not caring.