I agree with OP. The UNLV game hurt. I was in 6th grade. I remember crying.
For me, however, is the 1999 NFC Championship. The Vikings were 15-1 that season. Kicker Gary Anderson was perfect all year, of course, until that game. I believe the Vikings would have beaten those Falcons 9 out of 10 times.
I was a senior in college at Mankato State. My roommates and I did not even watch Super Bowl.
I still haven't gotten over that game and have been kind of numb with the Vikings since. Then you add the Blair Walsh miss and the NFC Championship where we choked against New Orleans. Plus they have been destroyed twice in the NFC Championship. All of those sucked, but nothing like the Atlanta game.