I don't mean he's not good. I can see how good he is and how he's scoring. And how Chelsea perform with or without him. But I just can't understand in which ways he excel.

He's incredibly hardworking in attack, he's clinical finisher and also strong.

Willpower.

He knows how to force his way through defenses and keep hammering them even if he's not succeeding. Persistence is how he makes himself a threat.

While he may not be Ronaldinho of this generation, he's certainly a fighter giving his all with his killer instinct.

1 word.. BEAST

He is similar to Crespo or Inzaghi, he is very opportunistic and very clinical, but in his time at Atletico, he has shown he is great at headers.

Diego Costa is simply the most passionate player in the game I have seen in a long time. Every game is like war, he'll do anything to win. Look at his goal yesterday against Boro, reacted quicker, and moved with hungry intent before any of the five defenders around him, to poke the ball in. And don't go on about his suspensions now, ever since he got to four yellow cards, I don't think he's even committed a foul.

I'm sorry, but he can dribble, shoot from distance and head. He scored from outside of the box against West Ham and a cracker against Southampton, and has scored many headed goals in these last three seasons, and even more including Atletico. I think my fellow Chelsea fans would agree that Costa in arguably the player we like leading our counter attacks. He dribbles accurately at speed down the centre of the field and always finds that final pass.

Even Calum Chambers wanted his shirt after the game.

3 words sum it up. premiere-leagues highest scorer!

He is unique, nobody understands how he does it but he is the best at it an absolute nightmare for defenders.
He keeps going for the full 90 minutes non stop, he is a beast.