Bungalow safer.
You can't fall down the stairs, its much harder to get trapped by fire, easy to clean the windows and gutters. The privacy thing…bungalows are generally built on larger plots with larger gardens, so you would normally have windows at the back that are not overlooked. And with reference to burglars, they really don't want the hassle of a confrontation, so would probably choose to pick a house rather than creep past your bedroom door with your car keys and wallet.
We used to live in a basement flat, bedroom was at the front and people could look down into the room as they passed. Solution, we stuck up a wooden venetian (sp?) blind, angled it so the sun could come in but eyes couldn't 🙂
Live in a house now, the upstairs bedroom is much more overlooked by the opposite side of the street.