Another big part of projecting a quarterbacks success is how well they mess with the players around them. Certain quarterbacks are more comfortable with a certain type of receiver while others it does not matter. A running game is also very important in the early years for a quarterback. The less you ask them to do the better. As they get more experience they will become better, but throwing them to the sharks to early is a recipe for disaster.
Lastly, coaching cannot be underestimated either. Finding a quarterback that meshes with a coach early using will find success much quicker. Coaches and quarterbacks that butt heads will lead to more on the field issues then people realize. Having a coach that molds and understands there quarterback usually means quicker success down the road.
As you can see there is alot of things going into picking a quarterback in the NFL draft. This is why so many quarterbacks eventually are label NFL busts. Finding the perfect fit is tough as the quarterback graveyard of what might have been will continue to grow.
