I would love to see more done with the 6 humanlike races already presented
Cross Clan breeds, with names to match the cross clan of course. This allowing players to take on what aspects they want from which clan.
Cross Race - Well.... so many options and it is shown that cross race couples have and do form quite often.... Hyur and Elezen most often in the Gridanian area. Miqo'te of the Sun clans seem to be fond of getting with anyone really. Either or the point stands. Cross Race Couples can and do happen and have apparently happened in the past. Lets see some of that in game.
Homelands The game does state that the player races are not from Eorzea originally.... i would like to see where they all hail from incidentially and what their traditions and lore is like in those lands. And whom they might happen to Worship, like in the case of the primals, whom created each of their own tribes.
Existing race made playable
Garlean
These are already a well presented race and have shown to be able to side with the races of Eorzea like Cid has
For a new race id like to see playable
Living Doll/Black Mage - FF9
These little guys are just all kinds of awesome and cool. Even if not a playable race, they can still be something to add as living dolls wondering around Ul'dah as servants, or even present in an area unexplored
New races as either NPCs or a Player Race
Dwarves - Many
Not much to say on them, though i think we have the Kobolds for this in 14
Lufanian - FF1
Not sure on how these would be present other then maybe remnants of an ancient, highly advanced civilization
Hummingway - FF4
A Roaming friendly beast tribe, they offered various things during their appearance in 4
Lunarian - FF4
A nice little thing, a race that hails from Hydelins moon
Werewolves - FF5
A Beast tribe that worships the Primal Fenrir, though i would love to see them as a player race too
Moomba - FF8
A friendly little beast tribe race akin to the Sylphs
Burmecians/Cleyrans- FF9
A new race that work solely as Lancers/Dragoon or Cleric/White Mages
Genomes - FF9
A race that is tied to the Garlean Empire as soulless beings who work alongside them
Qu - FF9
A race of a far off conteninent that is reveired as master chefs.... and known to put anything presented to them for the first time into their mouths
Guado - FF10
Another race from a faraway land that works to preserve either the forest or a place of eternal rest