I use it 100% of the time when the rules of traffic prompts me to use it.

Within a small single-lane housing area: I blink.

When exiting my driveway and the road reaches a dead end 100 meters in the one direction, so it should be very obvious which way I’ll go: I blink.

The roundabout in town which is so tiny that it looks more like an intersection, and when heading straight through it: I blink.

It’s so much better to have a habit of blinking and making unambiguous signals than to forget it. It helps with the flow of traffic and probably lets everyone get where they need to go quicker.