Smith is the anti-Tucker. He conversely reins his ego in. You can see it most significantly in the way he talks about his family. He choked up looking at his wife Candace, and three children, Robert, Bella, and Charles. He thanked them for their support in his journey from Corvallis to East Lansing. Above all else, you know they are the reason for Smith doing what he does.
Source: Spartan Shadows