Valencia's responsibilities have changed within Louis van Gaal's preferred setup.
Valencia has often been used in the right wing-back role when he has played, and when the Dutch coach has opted for the 3-5-2 system.
The Ecuadorian told MUTV: "I enjoy the attacking side of the wing-back role," he added. "I like driving forward as I always have a lot of options in front of me and I enjoy the fact that it's hard work, too!"
The 29-year-old has featured fairly prominently for United this season. Injuries have had their impact on the side and Valencia has been no exception.
He has, however, managed to make 17 appearances for the club this season, and despite failing to register a goal this term, he has provided three assists.
The role tends to have been shared with Rafael, but there does seem to be a lot more work to the wing-back role rather than a standard winger or full-back role, given that most of the time going forward, you've also got to cover the space you've left behind as quickly as possible. So, getting up and down the flanks with ease if of paramount important so the defence isn't too exposed.
Van Gaal's successful sides have always had hard work at the centre of it, so the fact that one of his players seems relish more work will please him. Assured performances on the pitch would please his manager more, but if the comments are back up by work ethic, then there is little more that the manager can ask for on that particular aspect of his game.