The good news: If the Geico characters don't stay relevant and loved, the car insurance brand always has America's second-most-loved spokescreature, the green gecko, to fall back on.

FORBES: America's Most-Loved Spokescreatures

Employees First, Customers Second does not guarantee that employees won't feel stress or will always feel happy.

FORBES

Second, even when the campaign struck the right balance, it couldn't always get the former president to the stick to the script.

CNN: Analysis: What's next for Bill Clinton?