If you are going to introduce Vanity gear why not introduce Notorious Monsters as well.
I think if you made some of those Monsters drop Vanity that is exclusive and or can be put up in Auction house it will add an extra element that this game seems to be missing. ATM there is no go get them item to have just for the sake of having it. (Besides Minions)

If you add this to the game it will please many that like the FFXI system, while not intruding upon you gear progression system, it won't be a must have in game so players that want it simply put the time and effort into getting it or pay for it.

By introducing this system it will also help with the economy some what. Provided that some of the Vanity gear from NM's can be sold in Auction house.

The exclusive NM Vanity gear could have a custom Emote assigned if you get the full set. It provides goals that you can't achieve with by purchasing power and can be a decent time sync for those willing to put in the effort. Frankly I don't see why this would be a problem to implement. It could work very similar to how FFXI system worked. With a mixture of time spawned and mobs killed.

what do you thing about this? Feed back or additional ideas?

I also would love if crafters could make vanity gear.