I never seem to get enough sleep. I can usually just go straight off anywhere – I use my commute as a good opportunity, but on the days when some blasted gasbag sits next to me I do really feel tired for the rest of the day. 7.5-8 hours max is all I can usually squeeze in, but if left to my own devices will happily go on for up to 12 hours. If less than 7 hours, I am a confused stumbling bad-tempered automaton.
I also inherited from my grandfather a remarkable ability to wake up pretty much to the minute when I want without an alarm – and tell the time without looking at a watch pretty much to the minute as well. A great trick! Don’t know how all that fits in with the 90 minute cycle thing, though.
I have no other talents whatsoever.