1. As a teacher, you plan an ICT research lesson purely so the kids can use the DrWhoogle search engine (as they're the only ones just as excited by it as me!)
2. You're made up when a kid in your class has a Dr Who lunchbox, and almost feel proud.
3. The best present you've ever given your dad and, equally joyful, the best present he's ever received is the Dalek bottle opener that says 'Exterminate', which cost £7 and which they like more than the rest of the hundred pound you spent on him. And instead of thinking that you didn't need to spend the rest of the money, you're proud. (It's been 4 years and it's still going to strong!)
Also, not me, but a teacher friend of mine built a whole week of lessons around episodes of Doctor Who. Quality!