Since Anton Ego has an antagonistic part, and it would be very easy to make into a joke. Mini-Egos running around critiquing the writing, the agents, the walls, themselves... They can only be calmed down by nostalgia, so Agents in the fandom step into missions armed with something nostalgic to them personally. (Me, a 90's kid, would probably bring a Furby to lob like a grenade.) They are also partial to ratatouille, naturally. =)