Are Sun Streaks Good or Bad?

I was taking some photos with my daughter in the backyard, she gave the camera back to me and I snapped a few photos of the leaves in the tree she was climbing in. I took one shot, on the second shot I was able to nap a sun streak between two leaves. I believe that this happens when the sun streaks across the lens but in this case it didn't seem likely becuase of the position of the first leaf.

Is this a good or bad thing to have in photos? Which picture is better?