Definitely one of the cleanest but most aggressive passers in the game right now. Hamilton has to plow into the side of a Felipe Massa to get anywhere on the track ^^
On another note, teams need to realize what sort of thing they are missing out by not keeping him in the sport. No Japanese driver has ever won a F1 GP to date. The team that carries that first driver to victory, will be immortal in this country. If they're smart, they should be begging for his signature on their contract.