Honestly, I like them both. The Zoras have awesome swimming abilities, but the Gorons are just... so epic. Especially the one from Skyward Sword. I don't know his name, but I freaking love his little happy dance.
Gorko, if I am correct. Or is it the other one?
ZORAS!!! They are my second favorite zelda race followed by the Sheikah. Hmmm... The real question is who would win, an army of zoras or an army of gorons? That's a tough one.