Part of what makes the New England Patriots great is their relentless drive to improve, even after wins.
That's also what makes them a little less fun to play for.
Retired tight end Rob Gronkowski said as much Sunday on the set of "NFL on FOX," admitting the one part he doesn't miss about New England is how the team -- especially quarterback Tom Brady -- doesn't properly celebrate its achievement.
"He's still frustrated, too. And it's like, 'Yo, you guys are 9-1,' " Gronkowski said. " ... They should be happy.