Chocobos all the way. I've never really had any interest in moogles, they generally are only marginally useful for the one time in the game you visit their 'village' and I don't find them particularly endearing to begin with.

Chocobos on the other hand are and extremely useful method of travel and one of the coolest methods of animal locomotion in video games.

I don't see this poll being divisive to our community or anything.