I really like the gentle flicker of my dynamo light as I ride along at about 4mph and the steady light it makes when I occasionally travel at higher speeds. And I like the rectangle of light it throws onto the tarmac. And the little pools on the road either side of me. And the shape of the light patch when I pull up behind a bus at the lights - a nice sharp cut-off that reminds me (not coincidentally) of the beam pattern of car headlight. And the occasional flash of reflected light from signposts and other retroreflective stuff when I hit a bump in the road.
My only concern about my dynamo light is that it might, in a close group, produce a weird effect that I've witnessed on a FNRttS, when someone with a similar light is riding behind me, and their light is properly angeled down and is lighting up the road beneath my bike and, when I look down, I can see every detail in the road surface repeated in an incredibly fast strobing sort of effect. It was a bit like those LED cats'-eyes on the descent into West Wycombe, which break up into swirling streams of tiny dots when you ride fast past them. Or a bit like walking into a room where a data projector is on, and it breaks up into a mad pattern of red, blue and green blocks as I move.
Is there a loose connection in my brane or has anyone else noticed this?