Unlike when the Green Bay Packers had a different starting quarterback, I never cringe when QB Aaron Rodgers decides to throw it deep. His completion percentage is low, but it's a low risk/high reward play. And he's pretty good at it. Pro Football Focus crunches the numbers:
"That guy" mentioned above isn't Rodgers. Go click on the link if you're curious, and go click on it anyway because it's an interesting article. But give yourself a few minutes to read it because it looks at every quarterback, and there's a lot of detail to sift through.
The take away on Rodgers is that no one completed more passes thrown longer than 20 yards in 2010. He did while having the 10th best completion percentage on such throws. He was close to average on the percentage of times he threw it deep, and the percentage he was intercepted. Overall, that makes him one of the best at throwing the deep ball.