Follow the manufacturer's guidance. Changing the procedures arbitrarily leads to errors, which lead to accidents.
Use an autobrake setting appropriate to the conditions. Less for dry runways and more for wet/contaminated runways.
It has been suggested that accidents or incidents occur when something happens to distract the crew after touchdown (reverse fault, speedbrake failure, crosswind, traffic etc) causing them to miss starting the braking process until later in the roll out. This might be the one thing that leads to an accident.
You can always cancel the autobrake once the landing is seen to be normal, by pressing the brake pedals or turning the auto brake selector back to a lower setting (or off).
Modern autobrakes are great, giving a steady deceleration which is much better from the passenger point of view than many pilots manage with manual braking, especially if the manual braking is left too late and a big bootfull is required at the last second to make the planned turnoff.
All very smooth, does not upset the passengers, who are more upset by crews that leave the seat belt sign on for hours in smooth conditions, or use full reverse thrust and hard braking to make the earlier turnoff solely because they are in a rush, or chatter unmercifully on the PA when they are trying to sleep, etc etc.
If you, the pilot, vary the procedures given to you by the company and something goes wrong, you carry the can. If the company varies the procedures given to them by the manufacturer and something goes wrong, they carry the can. Unfortunately, both of those cases happen all the time. If we all used standard procedures (ie manufacturer procedures as varied from time to time by input from operators) we would have a much better safety record.