SAF played Becks as RM, but Becks trained as a CM in during his time in the academy and even his early games were in the middle, he was a super excellent passer (short, long, through balls, crosses) and very tenacious in the way he played, when he left for Madrid, his reputation preceded him sadly, as Luxomorgo (RM manager) once said, he thought Becks was a celebrity play boy, but from the first training session he realised that Becks was serious athlete who trained extremely well and worked hard and he played him regularly, I think Becks is one for the very few players who gained super fame, due to his looks and marriage to a pop star, but that never impacted his professionalism ever, others would have been lost in his shoes.
But as a footballer, he was absolutely a top class player and his long balls/crosses were unmatched till today, see his assist for Ronaldo in a cup game against Zaragoza and you will know that his ability to bend the ball to his will was unreal