I've followed them for many years, from the dismal dark days of the late 90s when I decided I needed to support a team in every league in every sport, through the glory years of Peyton Manning, right up to the present day. Admittedly with varying levels of passion and interest, they have nevertheless remained unquestionably my team.
Peyton Manning is without doubt one of the greatest quarterbacks ever to play the game. By sheer numbers, he is 2nd in history for touchdown passes and completed passes, and 3rd for total passing yardage (and he's got a few years left in him). You have to scroll down on his Wikipedia page to see all of the NFL records he holds. Needless to say, he has been a somewhat significant figure for the Colts the last dozen years.
Then Manning was out injured for the entire 2011 season, and the Colts won just 2 games all season. They had the worst record of everyone in the league, and then, having got back to full fitness, Manning left to go to the Denver Broncos.
So there was relatively limited optimism going into the 2012 season, with most commentators expecting a mediocre display of rebuilding at best. What followed was an pretty remarkable and dramatic storyline of a season.
At the NFL Draft, the Colts secured the top college prospect quarterback, Andrew Luck, as part of wholesale changes that saw them start the season with a huge number of rookies on the roster. He proved to be an incredible success, setting a number of rookie quarterback records, and leading the Colts to the 3rd largest turnaround in NFL history from one season to the next. From winning 2 games in 2011, they won an impressive 11 in the 2012 regular season (more than Superbowl champions Baltimore Ravens).
This outstanding season included a remarkable number of 4th quarter comeback wins and game-winning drives, the highlight of which was a simply outstanding victory against the Detroit Lions, from 33-21 down with less than 3 minutes left.
This relative success from minimal expectations was set against the backdrop of Head Coach Chuck Pagano being diagnosed with leukaemia at the beginning of the season. The heartstring-tugging story of his fight against cancer united the entire city under the slogan 'Chuckstrong', leading to moving demonstrations of support such as cheeerleaders shaving their heads. His emotional return late in the season had virtually the entire NFL welling up.
In Pagano's absence, up stepped offensive coordinator Bruce Arians. In the 12 games he was at the helm, the Colts won 9, and when the season ended, Arians was rewarded with coach of the year in recognition of his achievement in the face of such circumstances. Then, having made it the playoffs against all the odds, Arians was hospitalised and absent for the clash against the Ravens.
It was there that it finally came to an end. Like the end of Cool Runnings, it wasn't a fairytale victory but a respectable and dignified defeat, to the eventual Superbowl Champions (who had their own destiny-fulfilling storybook ending to come).
And so the 2013 season begins this weekend with much optimism. Andrew Luck is a year older and stronger, Chuck Pagano is in remission and back at the helm, NFL general manager of the year Ryan Grigson (like a Director of Football) overseeing what will hopefully be another hugely successful season.