The Sugar Bowl v. Notre Dame in the early 70s. (yeah...I know...we lost...before breaking out the tar & feathers, let me explain...)
That's the *only* Bama game I ever saw in person w/ my Dad, who died suddenly in Dec. 1974 when he was 3 years younger than I am now. I'd give pretty much everything I've had since then to watch that one again sitting there by his side, learning from him how to be a die-hard, passionate Tide fan w/o being transformed into the north end of a south-bound horse...even when we lose a close one to the hated Irish. I pretty much have a "Dad, I remember" moment every time I watch a game. Any game. Ours or anyone else's. Live or on TV. (Ever seen a guy discreetly wiping a tear in BDS or Legion Field back in the day at the most random, joyful time? That was prolly me...*blushes*

)
So, yeah...that'd be the one for me.
exiled
p.s. - my 2nd choice would be "The kick" w/ the future mrs. exiled rt there by my side in Legion--what a great day that was!...3rd would be the Goal Line Stand, which I watched on TV...