hi adrian,
iv only just started delivering myself but i have found im getting good results targeting newish private housing estates, by newish i mean around five years old and i go for houses 3bed and up, nearly all these people seem to be quite young families with kids, and its the fashion in these types of properties to have cream carpet or laminate flooring, and we all know kids and cream carpet dont mix, why not give that a try its working for me.