City romped to a 4-1 victory over their local rivals at the Etihad and Aguero led the way, scoring a fine opener and then adding the third just after the break.
But the Argentina striker said: "The most important thing is that the goals gave us the win.
"I'm very happy that we won three important points, especially against United. All the team were brilliant, the defence as well. We're all one team, there are no individual heroes.
"We're all heroes, even the players on the bench. The most important thing is we won and we are happy."
And Aguero was purring over the quality of the City performance, particularly the fact that they continued to press forward in the second half, even though they were already 2-0 up.
"We were really motivated to win, and that led us to the victory," he said. "So that motivation helped us play without any anxiety.
"The most important thing is to give all you have, and the confidence and the attitude that the team had was very good.
"And in the second half, despite winning 2-0, we kept playing like that. We played very well."