You've got nice shots there. I like your street photographs, really feels like I am close to the subjects. You are right, its not easy to capture the moment AND get the technicalities right at the same time. Sometimes when I see the moment, and when I bring the camera up to my eye, the moment is over. I want to try training myself to shoot from the hip. Its tough, and so far, I've had a lot more misses than hits. Either aim too high, or too low. I think that by training myself that way, I can see with my eyes and still capture the moment more easily. Gonna take a long time before I master it.
By the way, what lenses do you use for your street photography?