I have a friend who panics if they go even 100 miles over their 5,000 mile interval...to the point where they schedule an appointment immediately and go the next morning. They will also agree to all of the upsell maintenance the dealer pushes on them. Their car is way over maintained, but they typically get 130,000 drama-free miles out of a car before trading so whatever works I guess.
I have another friend with a performance car who goes once a year for an oil change, is still on the original wiper blades [car is 6 years old], and still has the original tires on the car [summer tires]. They did need a new battery a few months ago, but used a battery tender every night for a few months before finally biting the bullet and getting that new battery.
Most of my friends and family, though, go in for an oil change when they reach the mileage showing on the reminder from the last oil change.
I personally use the OLM on my car and go in (or change it myself depending on my schedule) when it hits 10% or less. I let it get down to 3% one time, and the dealer service advisor admonished me and said that was too low and I should never go below 30%. OK, whatever.