The Scotland midfielder told BBC Sport: "It's a difficult question as you say. Someone who gives a 100 percent every match, is willing to sacrifice himself for the good of the team but someone who also enjoys football, enjoys being at Manchester United, enjoys playing for a top side and is looking to push on and to keep going onto a lot more things.
"I'm very quiet and family-orientated. I like to just finish training and go home to my family, prepare for my next games. Football is my life and I do everything I can to become a better player, a better professional. I'm a fairly easygoing guy but when that whistle goes I become a determined player."