The memory that comes to mind is my first MoodleMoot in Sydney 2011 (ish) .. Martin was on stage and looked up at the huge audience and said "wow ... Moodle has gone mainstream!". Many Moodlemoots later, I still recall how impressed I was to discover and understand OpenSource and Collaboration and proud to be a part of it.
It has been a wild ride since and I am sad I have missed the last few Aussie moots.. one day.. I will make it back again! (Anyone keen on a MoodleMoot in Zanzibar?)