Truth be told my #1 favorite side kick is Navi. I truly love how annoying she is. It makes me laugh, and cheers me up when I have a bad day. And thanks to XanaUzumaki, I have seen a whole different side of Navi. So yes... In the end my pick is Navi, but I would also have to say the King of Red Lions is another 1# favorite. But Navi is better!
I haven't played all the games on this list, so I'll refrain from voting in the poll, but I'm partial to fairies. I like the idea of a traveling companion that fits in my pocket. I'm going to go with Navi. So what if she told you how to open doors, like, once. You couldn't target without her. That's what made her awesome.