Sustainers and Self-Launchers- How often and for how long do you runyour motors (after launch)?

On Sunday, April 20, 2014 12:31:16 AM UTC-4, Eric Greenwell wrote:

If a pilot isn't using the FES on 10% to 20% of the flights, the pilot
has wasted his money buying the FES. The FES can and should be used to
increase the amount and quality of soaring the pilot does, and flying so
conservatively it's rarely needed will not achieve that goal.

Does this hold true in practice for most pilots and most propulsion systems?

What's your theory/philosophy on motor use and to what extent does your logbook conform to your goal?

Do FES flyers use their motors more frequently than petrol-powered pilots?

Does a motor increase the number of 'good soaring days' for you?