I have exactly the same feeling. I live in a very urbanised part of the Netherlands and as a landscape photographer I can't get myself to photographing the urban scenery. It is most of the time simply ugly, cluttered and congested. Maybe that would be a great theme, but for me photography is a bit of escapism as well.
I like the old towns though as a background for weddings and portraits. I am planning to go to Leiden when there is a forecast for a bright cold winter morning.
Most of my landscape work is done on holiday in Scotland or elsewhere on the British Isles. I just love the rest, wide horizons and tranquillity.