Credit: Eric McCandless/ABC Television Group © 2010 Disney Photo: Arizona, Mark and Callie Eat Lunch on Grey's Anatomy February 24, 2011

Arizona, Callie, and Mark are going to have a kid, and Meredith and Derek are trying (and we can only assume one day they will succeed. Shonda can't be that mean, right?). Obviously in both households, any children will grow up very loved. But if you had to pick, which set of parents do you think will be the best?