+1 on the beast tribe quests. They give you some extra side-stories, as well as bonus minions and mounts if you keep at it and rank them up. They're also - when ranked up enough - a good source for certain crafting mats if you're into that sort of thing, and offer dyes that are hard to get anywhere else (and therefore go for a fortune on most MBs). At 44, going by your Main Class note, you can unlock all the ARR beast tribes (note the Ixali are for crafters)

Here's some extra info