It has to be Super Bowl XXXII.
Because:
3. "Never lost a Super Bowl" much more impressive than "3-1".
2. I never liked John Elway -- anyone remember *his* approach to the draft? Still don't. I would have loved him to have never won a Super Bowl.
1. No "winner" lets the other team score as a strategic move. If you have to let the other team score to have a chance, you're already a loser. Yes, I mean you, Mr. H*lmgren Way.
Reasonably close second -- Atlanta playoff loss at Lambeau. If 4-0 "superbowl record would have been cool," "never lost a playoff game at Lambeau" is just amazing. That, to me, is when the "Lambeau homefield advantage died," and has yet to be regained.
And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
Romans 12:2 (NKJV)