I will break one out occassionally. I prefer subtle contrast as opposed to bold. For example, a bold royal blue stripe with contrast collar is a little too "Gekko" for this day and age. On the other hand, a subtle pale blue stripe with contrasting collar can look real good.
James Bond: Weren't you a blonde when I came in?
Tiffany Case: Could be.
James Bond: I tend to notice little things like that - whether a girl is a blonde or a brunette.
Tiffany Case: Which do you prefer?
James Bond: Well, as long as the collar and cuffs match...