People always talk about how time flies; it's become sort of a colloquialism now. You don't really understand it until you reach your late 30s and early 40s - and I'm sure time will move even faster as I get older.
One of my favourite things to think about is, if you could be invisible and go back in time, where would you go? I've always said ancient Egypt. I would love to see them building the pyramids, and I've always had a real fascination with medieval time and monarchy in medieval times.