Fellaini was on the scoresheet against in their draw with Manchester City yesterday.
"I think I am a defensive midfielder," the 25-year-old told the Mirror. "But the manager thinks I can play number 10, number eight, number six, so I play wherever he wants and I give my maximum.
"I prefer defensive midfielder because I know my job when I play there. More things are in front of you.
"It is difficult to play with your back to goal. It is not my position but the manager likes me there and I am happy to do it.
"I don't have a goal target. Now I have more chances to score because I play in front but scoring is not my obsession.
"It's the same for me whether I score or other guys score.
"Some people say there is a beauty about defending. Beauty is nice but the most important thing is success.
"If you have beauty but win nothing, it is no use."