My house has no numbers on it. i had originally intended to install some Neutra house numbers on the plaster to the right of the door but was too chicken to drill into that pristine surface and never got around to ordering any.
I'm really glad I didn't because, although these are really nice looking, they have become a complete design cliche, at least here in san francisco. any property that has been renovated has them.
Instead, I intend to spray paint our numbers in a small graphic on the sidewalk in front of the steps one day but in the meantime I have been using chalk.
When it rains, they get washed away and i put down a new design.