kasia is 100% right. I'm a geek (no surprise there), but I'm not into Star Trek. I'm not really a compulsive person, so maybe that's it, but it never grabbed me as a series, in any of its guises. Science Fiction yes, but then I've been an SF fan since I was very young. In fact SF books were probably the first adult books I read. The Famous Five to Asimov may be a bit of a leap, but it's what I did, fuelled by my father's meagre collection of well thumbed 50's paperbacks.
She's also right that we don't pay for logo t-shirts (I have so many conference ones), but we do pay for geek humour shirts and these sometimes do have advertising. But they are geek humour, so that's ok. ThinkGeek have some excellent shirts - I like this one.
There are some good geek comics around. GPF is one of my favourites. And yes I have the hots for Ki. And yes I know she's a cartoon character. Other favourites are User Friendly, PVP, and Penny Arcade. A good way to while away a dull lunch hour.