I daydream almost all the time, absolutely anywhere, and I tend to look down or stare into any empty space when I am. Once at school, I was absolutely bored in maths and was looking straight ahead but daydreaming again, and the teacher thought the whole time I had been listening really intently. They ended up praising me for paying attention the whole way through the lesson when I hadn't been lol. It's a pretty good skill though, to appear to be listening when you're not.
I love daydreaming, I'm a really creative person and I like to come up with new fantasy stories and game design ideas in my head. I especially like walking ahead of people just to be by myself, that way I can empty my mind and indulge in my fantasy worlds again. The problem is, other people don't realise, and it always irritates me when they think I'm being miserable because I'm not talking much. I just have an over-active mind and need a lot of peace and quiet to process everything.