The Armenian striker was attracted to Jurgen Klopp's men because of their style of play and revealed why he turned down the chance to join an English club
The Armenia international joined Dortmund from Shakhtar Donetsk for €27.5million in June after being linked with a move to England, with Liverpool a rumoured destination.
However, the 24-year-old insists he is driven solely by football reasons and that the chance to potentially earn more financially in the Premier League was irrelevant.
"Yes, I had many options," he told Die Welt. "But I decided on Dortmund because I like the type of football that is played here.
"Since we played with Shakhtar in the Champions League against BVB, I've watched all Dortmund games on TV.
"BVB have not only played fantastic football, but also football that suits me. I thought: This is a team where I can grow, can develop.
"Money is not so important in football. There's only room for football.
"I live football, think football, feel football, and if I play well, the money comes anyway.
"I have come to Dortmund to play and not to sit on the bench, as might initially have been the case in England."
And Mkhitaryan has declared his delight that coach Jurgen Klopp recently signed a new contract, keeping him at the club until 2018.
"That's really good news," he added. "It's really fun to work with him.
"It's just a joy to talk to him. Jurgen Klopp is a great coach and a great man."