I prefer Navi out of the two, she was the first and I don't find her annoying, mainly because she only forces you to listen to her two or three times and outside of that, "Hey, listen!" and her other phrases are about as annoying as the bell chime that comes with Tatl. Tatl is also happens to "like" you when she gets separated from her brother and Skull Kid. After a while, she does genuinely like you, which sort of cancels the start of the game out, which leaves her on level with Navi, except she is newer to the series.