I'm only about half geek. The other half is nerd. I enjoy horrible movies ( like Mystery Science Theater 3000), romantic comedies, music that moves you and thoughts that confuse you.
My favorite movie ever is Eternal Sunshine of the Spotless Mind. My favorite musical artist can vary, but it's usually a toss up between Nine Inch Nails, Kid 606, or (when I'm in the mood) Regina Spektor or Imogen Heap. My favorite book is John Dies at the End, followed by Code Complete.
For a first date, something simple and short. An easy environment with no obligations, like a small dinner, or a movie followed by coffee. I prefer first dates to be more of a "chatty" thing then a "talking" thing, if that makes sense.