Wow..I really AM a nerd!
Unless you wear a pocket protector, you are, like me, an aviation geek.
Here's one reason why I say with pride I am an aviation geek: I don't think I've properly identified an aircraft until I get the exact model. Calling it a 737, for example, isn't good enough (or geeky enough) for me. I need to know that it's a 737-7H4 or 737-222.
Take a look at my page on FlightMemory
and you'll see what I mean.