I'm just thinking down the line when I look to move to another job, and lets say the advert is for 1,500 hours, whether I can count all my hours or just the legs which I was "pilot flying" ie basically half of what is currently in my logbook.
Any sensible employer would consider all your hours as valid experience in that situation.
If you use an electronic logbook, you can log everything, then set up filters according to what you wish to count. So you could filter (for example) on "hours valid towards ATPL", and have another filter for "hours relative to employment".