Alpha Sapphire.
As a kid, I only had Emerald. never got Ruby or Sapphire. After a few years of trading with friends at school, I eventually ended up with a Kyogre from one of my friends on my hands, which I have kept and brought through all of the generations, up to Gen VI. Because of this, I have always liked Kyogre over Groudon, which is why I picked AS.
I never thought of getting Omega Ruby. I never had both versions of an initial core game set, and I don't think I could possibly play through it that fast to get the exclusive stuff and experience the game from a different perspective, but I'd surely like to, except that I have so many other games in my backlog I can't possibly keep up! Perhaps someday, especially if we don't get Z version this year. :P