While I reckon a premiership franks your success, it doesn't define it.
Remaining competitive for a long period of time and constantly putting yourself in the position to challenge for a flag is a clear marker that you're doing things well ... and that is a definition of a successful organisation.
I think this attitude was burned into my psyche, initially, during the Patterson/Sproule/Bartlett/Jeans years, when all I wanted to do was go to the footy and either win or see signs of improvement. Turning up to school on a Monday and being mocked by Essendon, Collingwood or Carlton supporters was dreadful. Anytime we won, well, I would be walking on air for the entire week.
But, I reckon, the other thing that defines success is whether or not you're proud to be associated with an organisation.
While we've won flags in the recent past, there have been other incredibly important markers of success along the way:
• Record membership
• Beating all of the other 'big 4' Melbourne clubs in the one year
• Breaking longstanding losing records
• Winning the hotly-contested signature of Tom Lynch
• Retaining all marquee players
• Recruiting and retaining a thriving set of Indigenous lads
• Reintegrating the VFL side
• Winning two Jim Stynes Leadership awards
• Etc
I imagine Geelong could compile a similar list of successes, with 'remaining in contention' near the top of that list. While they will forever gnash teeth over not winning a flag this past decade, to not consider that club as successful is just churlish.