Top ten geek haircuts

Mr Spock: Alien geekform
If you were travelling through space you'd want someone reliable as your science officer, and a good haircut is as much a sign of reliability as turning up to work on time every day, and having nice shiny shoes. Certainly, there's no room for frivolity with Mr Spock's hair.

We think it's a shame that there was never a story about aliens stealing Mr Spock's hair -- they nicked his brain, but they left that perfectly trimmed Vulcan Barnet undisturbed.