I like newish private housing estates myself, go for the ones with plenty of 3-4 bed houses, and your in buisness.
These new homes are pretty up to date inside and that means lots of leather suites and wood flooring, but were there is carpet you can pretty much guarantee it is cream or light coloured, and if they have large homes they have kids, and kids and cream carpets dont go together.
These type of customers are usually pretty house proud as well so you usually get called in to clean before they get to trashed.
All in all good customers to have, plenty of repeats to be had with cream carpets as well.