I love how Matthew played Darcy, how he acted with his body and eyes. Don't get me wrong I love Colin version of Darcy.
But Matthew is my top Darcy for the interpretation he gave of Darcy. For example how after helping Lizzie into the carriage, he release his hand like a burst of electricity just shot through it.
How in both scenes that he purposes to her his eyes are filled with so many emotions, ever following and realistic. Like how after she rejects him and attacks him over Wickham, he defends himself and his anger against her is shown. How after she wounds him he shows hurt and rejection in his whole face, but he shows maturity and grace as he leaves her.