Offensive tackles are extremely important for an offense and team. They are the guys that usually get no help outside of them to protect the quarterback. Most sacks are made from defensive ends, outside linebackers and cornerbacks coming off the edge. If they don't protect their quarterback and the quarterback gets hurt, the season is likely a lost cause.
A prototypical NFL offensive tackle is at least 6'5'', has excellent feet, long arms, great strength, good hand placement, keeps low, takes good angles to get to their man and can move. There isn't a total stud in this years draft like a Jake Long or Joe Thomas, but there are a lot of good prospects with potential.
Here are my top 10 offensive tackles in the 2011 NFL Draft.