I think I would enjoy spending a day with the
TP Zora. I love to swim, often like a fish, so they could give me advice on how to do it with tiring myself out (which is a bummer when it happens).
If not them, then the Twili would be awesome. Granted, I'd have to have some way of staying human in their realm. But if I couldn't, then I'd stay with one of the few Twili that can handle the Light Realm's sun, Midna! Hehe... So hawt, so snarky, sooooooo worth it.