I voted for the Colts/Bucs too. Partly because I don't remember the Bills/Oilers (I DO remember the Bills being ridiculed heavily for all the SB losses tho

), and partly because the Colts' comeback seems untouchable in terms of "best of all time". I will reiterate some of what kid a said, but here is why it's #1 in my opinion:
-It was Monday Night Football, everybody was watching
-Tony Dungy was facing his former team, who fired him 2 seasons ago
-Key questioned Marvin's ability as a WR earlier in the game, and Marvin got the last laugh
-The Bucs have the undisputed best defense in recent memory
-The Colts scored 3 TD's against them within a span of 2 minutes and 40 seconds to tie the game
-Vandy, the most accurate kicker in NFL history, got two tries to kick a chip shot IN OVERTIME and nearly missed them both
All these things add up to the best & most entertaining comeback in NFL history IMO. Maybe if I was older (I'm only 19) I would consider the Bills/Oilers more, but I'm not, so Colts/Bucs it is!