I would probably pick Ninetales. It's beautiful, grafeful, and would make one heck of a pet(great for showing off to your friends) The only thing is I'm all for peace and forgiveness, so I would teach it to be forgiving instead of it's vengeful personality.
I would probably pick Vaporeon because of its beauty and eligance in the water and in battle. It is as cute as a button, and is easy to manage. A Vaporeon would make a great friend.