The mists. It makes sense in a lot of ways except the pvp which I would if I could relocate back to the battle isles from GW1. Also Zaishen Order they are really interesting since I really love combat in the game.

One thing that has always interested me in the lore is the Jotun race!

They were a really advanced magic society and decided to regress to what they are now to protect themselves from the elder dragons. Wild and cool bit of lore.

I like the Skritt too :)

I would love for some in-game group (maybe the inquest) to just do an experiment and try and ramp up the Skritt intelligence as high as they can go.

I also really like the ideas of the mists and how everything seems to have come from the mists, but also everything that forms then impacts the mists kind of like rebounding echoes of reality.

The lore of the Sylvari has always interested me. But then again, the playable races really have interesting lore, compared to other MMOs imho.