I've only been to this year's BronyCon, but I would have to say that my favorite memory was either the dance circle at BronyPalooza or the plushie/waifu pit on Saturday. The pit was a weird experience to say the least. It started with one guy putting a Little Pip plush with a dollar in it's sock on the floor near the Starbucks, but an hour and a half later there was a group of probably 25-30 people surrounding it and the pit had grown to have multiple plushies, a Little Pip daki, trading cards, money, con badges, food, lightsabers, and really anything else you can think of. Security then came over to see what it was and didn't know what to do with it. They eventually said they had to shut it down because it might have been breaking the convention center rules, but not before throwing in some stuff themselves xD. I don't know the 2 staff members names, but whoever they were they were awesome.