When you said theatre I was think "Oh, fine, real-time acting in plays, great". Then I realised for some people theatre = cinema...

For me, I always prefer a film on the big screen, I just really enjoy the experience of surround sound, a dark large room, popcorn etc. I hardly ever watch films at home, mainly because to really enjoy the film, you need peace and quiet, something you rarely get in a house with people in it. Besides, watching a film by yourself is terrible, and no-one ever bothers watching films in my family anyway...