This was going to be a "Words that Should Get a Divorce" post about "walk" and "life," as in "walk of life." I'm a little bothered by the cliche -- or, I should say, by our dependence on the cliche -- but I honestly can't think of a better alternative for "They come from every walk of life."
From every realm of life? Every area of life? Every circuit of life? Every tour of life? Every peregrination of life?
See? I got nuthin'.
So, seeing as I'm clearly unqualified to depose this cliche, I figured I'd just look up its use of "walk" in Dictionary.com.
27. a department or branch of activity, or a particular line of work. They found every walk of life closed against them.
Maybe my dislike of this expression is a regional prejudice. After all, I'm in L.A. And nobody walks in L.A.