Would it not be exceedingly awkward to go about asking one's neighbors for input on your proposed barn quilt addition? I can only imagine the conversations in which you have to explain to them what a barn quilt is, describe your colour schema and proposed design, etc. What will you do if some are for, some against? I say, do a tidy and professional job of it. Some will like it, some may not. So long as you do not reside in a restrictive home owner's association, it's really only a matter of your taste and preference.