Aaron Rodgers is one of the most gifted (arguably the most gifted) people to ever play quarterback. And what really sets him apart is his incredible touchdown to interception ratio, which is 6.3 to 1.3 for his career.
But even after sitting and watching Brett Favre for three years, Rodgers threw thirteen interception (2.3% of his passes, almost double his current rate) in his first full season back in 2008.
Peyton Manning, meanwhile, threw 90 interceptions his first five seasons (an average of 18 per year) and had at least 15 each year. Then, he never got to 15 again until his twelfth season.