Ian Mckellen

When you grumble about a taxi being dirty, people your own age will absolutely agree with you, whereas younger people say, 'You should be so lucky to have a taxi - I walk to work!' So I have lots of young friends, who fortunately don't treat me as a guru, a person that knows all the answers.

We're very lucky, men, that there are these fabulous parts. Women - once you've done all the parts in Shakespeare, they start running out. So you can pick and choose and find something to energise you.

The most fascinating powers don't mean a thing if the guy's poorly motivated or dull, and the most generic powers won't hurt a well-motivated character. Personality and motivation are what make Magneto, Magneto and not Cosmic Boy. The powers work for him, but it's his motivation that makes him the character he is.

And I think that still is true of this business - which is basically research and development - that you probably spend more time in planning and training and designing for things to go wrong, and how you cope with them, than you do for things to go right.