One of my symptoms included my obsession with ghosts and law enforcement - I carry around a police badge with me, for example. I became obsessed by Hans Holzer, the greatest ghost hunter ever. That's when the idea of my film Ghostbusters was born.

My great-grandfather, Sam Aykroyd, was a dentist in Kingston, Ontario, and he was also an Edwardian spiritualist researcher who was very interested in what was going on in the invisible world, the survival of the consciousness, precipitated paintings, mediumship, and trans-channeling.

I've always been a big fan of science fiction and of the worlds of the spiritual and the mystic.

We have the most beautiful planet - the Rockies, the purple fields of the United States, the Lake District, the Pyrenees, the turquoise seas of the tropics.

I get really grinchy right up until Christmas morning.

Certainly the format of ghostbusting lends itself to a videogame beautifully.

Folks have to pin me down because, for one thing, I don't have a laptop. I don't have an iPhone, and I refuse to carry them because they're immensely hackable.