So if i am reading the replies right, the correct method is a manual log of time from brakes off to brakes on that involved an actual flight ( not taxiing out and have a change of mind) which makes sense, and forget about both the hobbs and tach.
The reason I ask is I am not really that interested nor care about "hour building" as i am a recreational flyer and will remain so. However I do want stay within accepted norms for hour logging for insurance purposes, as each year when the policy comes up and they ask me how many hours I have, I want to be accurate as I can just imagine what loopholes they would use if there was a claim.