Custom Mount Roulette and Flying Mount Roulette

[Nezerius]

Expert Roulette contains all dungeons of the recent patch.
Mount roulette contains all mounts.

Mount roulette contains all the mounts that work in all zones
Flying mount roulette contains all the mounts with the ability to fly.

Given the fact that the flying mount roulette was added due to feedback, and contains a part of the mounts in a player's possession, it's not farfetched that additional feedback can bring about something like this:
Favorite mount roulette - contains all the mounts that the player has tagged as favorite.
For all intents and purposes, that would still be a roulette, as you only get a choice on which mount pool it'll pick something from.