I really love the Zoras, especially in TP where i felt that their aesthetic design was wonderfully realised. Somehow i went through the game and didnt really visit Zora's Domain at night until i spent a day goofing around doing sidequests and when i dropped down into Zora's Domain to see small parts of them glowing in the night like photophore cells on deep sea fish i was really happy and impressed. Their armour (if you can call their helmets etc that) looked cool too and really gave the vibe of a genuine cultural history. Ralis was cool too, which was a small mercy since every younger character in TP annoyed me to hell, and Rutela looked very regal and almost commanded the screen with her presence, perhaps even more than Zelda herself did. So yeah Zoras get my vote =] (why'd they have to evolve? =[)
Ties between Kokiri and Hylian for me; I love them both so much
The idea of being kids in a forest, constantly messing around with no real aim...it's like a childhood come true. And Hylians, they seem to have an awesome order going about. There are a couple major changes I personally would make, but otherwise they're solid.