Sure, happy to help out.
He started as a young backman and showed a bit when we had a dearth of tall backs coming through. He and Ferguson were blooded at a similar time. In his third year (2004) they switched him forward where he played arguably his best year as a hard leading centre half forward. Our kicking style under Daniher suited him down to the ground, we were a better team and mass flooding hadn't quite hit the AFL. As zones came in, flooding became rampant and we deteriorated as a footy side Miller started to lose his mojo and we started to lose the ability to kick through zones. Miller has no tricks, is poor on the deck and isn't great one-on-one, so the evolution of the game wasn't to his advantage. He found himself back and forward without making either end of the ground his own.
He's always been a leader and well respected off the field, so it's no surprise that he's been in the leadership group and in many ways he's been at the right club at the right time. The club lost its key forward in Neitz and he's had no pressure from the likes of Newton, so it's not hard to see why he's retained his spot on the list and added to his games tally. The club also wanted him to be the bigger body around Watts while the latter developed. Henry Playfair is in his 7th year of AFL footy. While key forwards are hard to unearth average players will remain on lists.
I watch him closely and he's not hard at it. He doesn't bust open packs in marking contests, or pave the way for mids. You only had hark back to the G last year to see how a young Joel Selwood was prepared to risk life and limb running with the flight of the ball unaware what was coming the other way, whilst the much larger Miller running towards the ball wasn't. Selwood took the mark while Miller avoided body contact.
Miller has played 131 more games of AFL footy than me. He has limited ability, but he has ability. Any "heart" he may have had earlier in his career has eroded. He's not hard at the contest and has become a list clogger. Those lauding his heart and apettite for the contest are delusional, or just don't watch footy closely.