Remember those items thought to be useful like the Easter egg event? Or the lovely holiday event getting the most awesome item in the world, the Treat staff II (Rechargable 20hr 1/1 staff), or the novelty item that gives cookies for the mages to rest mp faster, the santa hat thing.

Here's an example:

http://wiki.ffxiclopedia.org/wiki/Treat_Staff_II

Devs, please make those cool and niffty items hard to get and useful.