Although there are lots of them that I love about our own program, I'll only mention one from the homer perspective, and that is Rammer Jammer...remember when we used to play it before the game instead of only after a win, lol.
For a few that it pains me to acknowledge about our rivals, but you can't deny they are cool and add to the experience...Auburn and the eagle flight, Tennessee's band playing the opposing team's fight song before the game, and LSU with the announcement that it is Saturday night in Death Valley come to mind and I've personally experienced.
Lastly, I'll say Chief Osceola and the pregame chant at FSU, Virginia Tech and Enter Sandman, and since we play them this year, Wisconsin and Jump Around...