The Patriots are arguably the best drafting team in the NFL. They can take players that not many people have heard of and make them into some good players that can make a huge difference in what the team does.
The perfect example is Tom Brady. He was the 199th pick in the 2000 draft. Nothing was expected of him from most people.
Now he is the cornerstone of the franchise. Also, the franchise is great at turning players around from a behavior standpoint.
Some players they have turned around from a behavior standpoint are Randy Moss and Corey Dillon.