Lately I've been working on the Beast Tribe quests in FFXIV.
The Beast tribes are an interesting part of FFXIV. They're sort-of monstrous, but generally the "civilized" people of Eorzea have been pushing into their territory, in some cases outright violating treaties. In response, the beast tribes summoned their gods as Primals. But exposure to Primals "tempers' a normal being, brainwashing them into slaves of the Primal. The beast tribe quests are handed out by a splintered faction of the tribe, who have avoided being tempered, and need your help to defeat or survive the remainder of their tribe.
It's an interesting dynamic, combined with the very different personalities of each tribe. For example, the Amalj'aa are a warrior tribe revering strength, the slyphs are playful and like to play tricks, the Vath are a breakaway sect of an insect hive mind who are now just discovering individuality.
So far, I've finished the Amalj'aa and Vanu Vanu stories. The Amalj'aa was a typical story of gaining strength to take revenge. The Vanu Vanu was ... kind of weird, really. It ended in an epic dance-off.
Here's a video of the ending from YouTube:
Mechanically, the Beast tribe quests are kind of like faction dailies in WoW. It's aimed at the solo player, and you earn reputation with the tribe. As your reputation increases more of the story is unlocked, as are new quests. Rewards-wise, you earn a little bit of endgame currency, pets, and a mount at max level. The beast tribe quests are also a way to progress on the Relic weapon quest.
The big mechanical difference between WoW's factions and the FFXIV beast tribes is that FFXIV has a very low daily cap on quests. You can do a maximum of 12 dailies each day. The tribes effectively only offer 3 quests per day (the original tribes offer more, but only 3 that give max rewards).
I actually like this low cap a lot. It's pretty easy to finish your dailies in about 30 minutes. If you can play for longer, you can then do a dungeon or whatever. But if you only have half an hour to play, you can still feel like you got everything done. Beast tribes are aimed at the solo, casual player, and they feel like they hit the perfect spot for that audience.