Geek Traits vs. Nerd Traits
Someone with a specific niche interest lifestyle that they have become the expert on.
Knowledge can range from mundane to "living encyclopedia" status.
Can be pretentious and longwinded.
Wears ironic t-shirts.
Interests might include gaming, film (both artsy film and anything Will Ferret stars in collecting. gadgets/tech, computing, coding, hacking, techno music, screen printing etc).
A fan of gadgets.
An early adopter
Interests might include: Battlestar Galactica (MG), LARPing, SecondLife, Physics, Chess, Fantasy/Sci-Fi, Computer programming.
Diverse and sometimes Impractical skills due to broad interests in games, movies, science, computers, etc.