But if you had to pick one?
Yes, I think they are
I'd like either Zinc or Brass (but I have not read Era 2 yet, and I'm assuming my answer will change). What about you?
Yes! They cause all the trouble!
Befriending a spren would be awesome, regardless of gaining magic powers (I guess Seons are similar)
From what I've read, White Sand. Might have been the format though. How about you? And your favourite?