When I use my Nikon F3 on the street, I almost always use Tri-X or HP5+, almost always with a 35/1.4 Ai-S, and almost always use a deep red25 filter. I almost always push it, too. Not a big fan of midtones when I'm using that setup...

Conversely, when I use my Leica, I use a Summicron DR, and the same films, but rarely use a filter, and err on the side of over exposure for smoothness.

Diff'rint strokez.