I seem to remember reading about some test results that found the offensive linemen were, as a group, the most intelligent men on the field. It's easy to see why.
Last year I resolved to watch good football (living in the Lions broadcast zone and being too cheap to cough up for Sunday Ticket largely thwarted that). I think this year I'm going to try and focus on watching the line (inso far as the camera operators let me), as articles like this have convinced me that winning football teams all start with the lines.
This article was pretty cool. Centers have the most fun on the O-line. All the other O-line guys block D-line guys on almost every single play. Not centers, they get to go after LBs and Safeties on most run plays. Even when centers do have to block D-line guys, they usually are the double team guy, shoving some guy from the side. Once the ball is snapped the hard part is over for the center. Good times. The Chiefs Casey Wiegmann makes it easy to pay attention to the O-Line.