There are two types of people in the world, those who can't infer from incomplete data.
I'm the second type (generally).
Geek by aspiration, polite, and as sane as anyone can hope to be in the modern world. I like mucking around with tech, always have 20 unfinished projects to every finished one.
I'm very much a homebody, I used to love pubs and clubs but I've gone off it, I'm no longer a fan of noisy crowded indoors environments; I can however easily spend an afternoon sat outside of a coffee shop on a busy street people watching.
I'll happily be my own best friend for days on end. I'm almost never bored, there's always something to do/build/read/plot/dismantle/play with
I love Randall's take on growing up http://xkcd.com/150/
Alcohol stopped agreeing with me a few years back, I get the hangover before I leave the bar so I almost never drink anymore and I don't get past a little tipsy when I do. If getting drunk has to be part of your plans that's fine, but I wont be joining in or tagging along.