i shoot with whatever camera i have with me..
on my X100 i rely on the AF for street shots, MF for close-ups
on the other RFs such as M9/6 and R2, i try to get max DOF via f8-16 dep on avail light, and yes i shot prefocus for street..
but there are times i just want to use my other camera, or simply when i'm feeling lazy.. then i use my Hexar AF, or GR1..
i think color doesnt matter (just an excuse for me to have all sorts of cameras), it's just your whole demeanor and style 🙂
this is cliche but really, a smile works wonders..