You can log what you want in a personal flying logbook. Its what you log and try to count towards the issue or revalidation/renewal of a rating that becomes the problem.
As an examiner if you tried to count the time spent taxiing for a flight that did not take place towards the issue/renewal/revalidation of a rating I would send you away with a flea in your ear with the paperwork unsigned.
The rules are very clear around what is considered as flight time, from the moment you release the brakes for the purpose of flight until you apply the brakes at the end of the FLIGHT. Props turning or taxiing around are not flight time. It's very simple.
Last edited by S-Works; 29th Oct 2012 at 15:48.