I use my bike just like most people use a car. It is my primary transportation for all reasons and purposes. I live in a small metro area of about 150,000 souls. I ride a MTB on city streets, suburban roads, MUPs, unpaved trails, alleys, etc. In the summer I take longer road trips into the countryside. I love ice riding in the winter.
On streets and roads I ride in a vehicular fashion, meaning that I follow the laws and ride right in the mix with the cars and stuff. I occasionally take shortcuts on sidewalks and alleys or anyplace I can find them. I especially enjoy finding strange routes across the city, utilizing all types of facilities and surfaces.