SportsGuy,
Trucking is typically though as a rating for a big power back ie Brandon Jacobs, Michael Turner etc. They literally will RUN defenders over when they come into contact. These HB's typically fall FORWARD when making contact. (HB's)
Elusiveness is a rating use for quicker more agile backs IE Reggie Bush, Darren Sproles etc. They will SLIP out of tackles and look to juke & jive away from pressure. (HB's and WR's)
BC Vision is soley a CPU rating. It is when a player has the ball in there hands. Its how the CPU ball carrier sees holes and runnings lanes. (HB's)
Impact Blocking is a rating for players making BIG TIME blocks - laying a pancake when it matters most. They may not be sound and make blocks all the time but they have shown the ability in the past to make the GAME BREAKING block! (offensive linemen, TE, and fullbacks)
Power Move is a pure bull rush by a defensive player looking to attack the QB. Think of a player like Ngata (DT from the Ravens) he doesnt use speed or quickness to get after the QB he pushes the offensive line back into the face of the QB (important for defensive linemen and linebackers)
Finnesse Move - Think Dwight Freeny and Rober Mathis. They use speed off the edge and quick cuts to get after the QB. Mix your Dline with finnesse players on the edge and power plays in the middle! (important for defensive linemen and linebackers)
Pursuit - this is how well your CPU defenders take ANGLES toward the ball carrier. Sometimes they take the pythgron thereom (shortest distance between 2 points) and sometimes they may go rogue. High pursuit ratings is IMPORTANT! (all defenders)
Hit Power - this might be my favorite rating on the defensive side of the ball. This is how hard a player will hit there opponent. This rating causes the most fumbles when used correctly. (linebackers and safeties)
Press - this rating is for how well your cornerbacks will play bump n run off the line of scrimmage. the higher hte better - ie charles woodson. (corner backs)