I agree with you, I think the ISO could go lower; I can see the noise. I really like the colours, and I think people looking away is not a bad thing; its just that I think its framed too tight. When people are not looking at the camera I always think its best to give some context to the viewer as to what they are looking at or where they are at. In this case, the bodiless hand and the tight frame leaves me wondering; why and where are they sitting, and whose hand is that holding a flower up to them? (which could be an even cooler subject to shoot, a child holding up a flower to a mother who is on a cellphone)
Other than that, I think its a great shot
I dont have the courage of taking shots of strangers