Both are my favourite characters in Final Fantasy. I just think it's dumb to have a favourite game because of a couple of characters. Thankfully, though, FFIV is a rock solid game, has a great storyline and amazing music. I think some of the other games in the series trump it in some of those areas, but yeah, I'm having it as my favourite just because of Rubicante and Golbez, and I'm kind of acknowledging the fact that it's a very superficial way of choosing a favourite.
I hope that made sense.