Recently I bumped into my photographer friend Leon Bonin, near Downtown Camera in Toronto. When it comes to street photography, Leon is absolutely fearless; he will ask anyone if he can take his/her picture, and he gets great results.
From a technical point of view, I am very happy with the combination of HP5+ film (not know for super fine grain) and Perceptol developer. Reasonably tight grain, and nice tonality!
Rolleiflex 3.5E3 (Xenotar lens)
Ilford HP5+ film developed in Perceptol