>>29597828Latios is my favorite too. But I don't use it, neither on my in-game team or for competitive. I like Soaring with it though -- I picked Omega Ruby since I wanted to summon it.
It's my favorite because it has a sleek design, is a Dragon, has a noticeable capability for intelligence and understanding given it's Psychic, and has a wonderful color scheme.
I liked it before I even got into competitive playing, so it was cool to find out that it was consistently a good mon (at least in Singles). But like I said, I don't use it, since it feels like a 5-6 game if the opponent has a Tyranitar.