I think the aggression thing is less and less prevalent now due to the pace of the game, it's really taken the enforcers down abit. In previous years you'd make a tackle, dominate the opponent and give the opposition some push and shove, may be abit of niggle now you do that and it's a set restart, you push someone too hard and it's a penalty or sin bin. Look across the league who are the enforcers now? In my opinion the best enforcer of the last 5 years has been JWH, even he's had way less of an impact this year, Pangai who was an enforcer of sorts quickly became his team's ultimate liability.