With all the new poses in the last 10 years, plus the knowledge of customizing my own poses from existing ones, I am in electric football heaven.
The stock poses are really great these days, and here are my top 8:

Footballfigures:
"the freak" (sprinter, running back, def. end, safety)
"the minister of defense" (defensive lineman, offensive lineman)

Buzzball:
"the beast" (running back, end, defensive line)
"lightning" (end, running back, safety)

Miggle Proline (ITZ replicas):
dropback quarterback (both hands on the ball)
stand-up right def. end, outside linebacker (arms down at his sides)
hunched-over, def. tackle guy (launching himself off the line)