After spending the entire last half of his life playing as an NFL quarterback, and lauded as one of the widely accepted truly great quarterbacks in the history of the game, I would imagine anything short of joining the Blue Angels or being an astronaut leading a Mars mission would be somewhat boring. But he's going to have to do something with the rest of his life, or he's going to drive his poor wife nuts around the house.
So he'll just have to accept the reality that anything he does for the rest of his life will be relatively boring in comparison, so he'll just have to pick something that he loves enough, and in which he finds enough value and passion, that he can be happy doing it. I don't think going the Brady/Aikman/Romo route would be his cup of tea; he'd have a hard time being diplomatic every single minute of a broadcast - but I can see him working as a coach. He knows a ton, and loves the game and day to day life of the NFL. He'd sure as hell command the respect of the players.
If that was the last game he ever plays in the NFL, I feel badly that his career ended that way. I really do hope he goes for one more season; it was pretty impressive that he came from that major injury and played at the high level he did. I'd love one more year of watching him slice and dice defensive backfields.