Hi Sandra,
For myself, I wasn’t sure either, so I designed it with and without the photo included. After playing round with opacity etc, I decided not to include it in the end on the roller banner, but did include it on the flyer version.
It’s worked out well for me. One side of the flyer includes an image of me, the other side includes benefits, and the feedback has been that it is has been useful for remembering who I am as well as the benefits I’m promoting. So the flyers work well in public events and business fairs, where people often just take something on the way past.
My business cards are expensive, and have impact every time I give someone a card. They remember me because we’ve interacted, so the card is sufficient there. Different needs different products. That’s just my experience though.