Some personal memorable moments of collecting Cybertron:
+ Dec 2005/Jan 2006; I was spending New Year's in Beijing and purchased 2 Cybertron TFs there = Galvatron and Snarl. I was taking a flight from Beijing to another part of China, and the airport customs officer inspected my carry on luggage. When she saw my toys she demanded to know what they were. So I proceeded to explain to her the ENTIRE canonical history of the Transformers; as in from the beginning of the creation of the universe until current events. Needless to say it was quite time consuming and I could see her eyes glazing over.
+ On June 6, 2006 (06-06-06) I decided to buy a big bad Decepticon... the biggest baddest one I could find was Cybertron Sky Shadow which I quickly bought then took home and opened it. Then I read the tech specs and discovered he's really an Autobot undercover! D'oh! (ah well, I still have Energon Scorponok as my 666th Transformer (purchased 2004) )
+ In Dec 2005 I purchased Universe Thunderblast in Hong Kong (not a Cybertron toy I know, but same era); and later that month (or maybe shortly after New Year) I went to the Great Wall of China and took a photo of her there. I don't know how many other people have taken Transformers onto the Great Wall and photographed it there... hopefully I was the first.