You have to wonder if Brett Favre is having some sort of mental breakdown. They say that players, NFL players in particular, have a very difficult time adjusting to life after sports. I think Favre is suffering through this as well.
There was this story a while back on Real Sports with Bryant Gumbel about a program that the NFL Players Association oversees, which helps players acclimate to life after football. A lot of players suffer through depression and so forth and depend on this program to get them through the day.
What has happened to Favre in the last 20 years could last most people a lifetime. Now that he has time to reflect and look back on all of the stuff that has happened to him (his wife, her brother, his father, winning a Super Bowl, getting into a serious car accident), I can only believe it's overwhelming for him to process all of it.
He's always escaped through the game of football, like a lot of us. So, why not try to continue playing, and put off all that crap for another year or two, he is probably thinking to himself.
I don't know ... it's just a thought I had, but who knows. There may be some logic to it.