Thanks to that Facebook memories thing, I was reminded that the best Transformers convention ever was 4 years ago. Hard to believe it was so long ago, but that's the march of time for you. If you weren't there you really missed out on something special. It was literally everything I wanted in a Transformers convention.
There's an element you only get when something is made from pure love. When the people making something just want it to be what people want. When they say to themselves, "I want this to be the kind of show I'd want to go to".