[QUOTE=bobwysiwyg;1146276]I'm surprised nobody has suggested a zoom. I find a 28-70mm pretty handy for most scenes you stumble upon. Often you really don't have time to change lenses

Speaking personally I find that shooting people in the street with short zooms that by the time I've put the camera to my eye and zoomed the image to the optimum size before you shoot the picture has gone, I much prefer the 35mmf2 that if left focused on about 15ft and using the lenses hyperfocal distance you don't need to focus just point and shoot.