Two Identical Babes with Opposite Personalities

I used to worry about whether or not my little guys would be treated as individuals, as separate and unique people, but now I think I may not have to worry about that. Mason and Spencer have personalities on opposite ends of the spectrum. One is crazy, mischievous, always on the run, even eats standing up in his high chair. The other is mellow, content, and cautious about taking risks. They're only 1, but I am sure that the traits I see developing now are a preview of what the future might hold.