Making beats.
Already you’re like WTF, right? Try telling this to people who ask about your hobbies, and you’ll surely get blank stares from atleast half of them. In many circles it’s popular, in others, people just don’t get it. Ah well.
My husband and I make beats. GAH! It’s everywhere! Even here! :eek:
Like hip-hop beats? Is your hobby otherwise known as “mixing”?
Multi-level marketing (your brand here) can become a way of life.
I’m watching an unofficial message board for a brand of rubber stamps I purchase. (I don’t sell them).
There are 24,000 MB members. A large number of the members are at the annual convention which started today. People are extremely hyped about the new product and meeting the stars of this little creative world.
There were hundreds of messages on the public part of the board when the new catalog came out. I have no idea what was going on in the sales rep side of the board.
js, I was wondering if you’d like to read a little something I wrote…
Christian popular culture. According to my roommate (who was raised by fundies and was thus square in the fast-paced world of Xian pop culture), there is an Xian band that corresponds to every popular secular band–Xian gangsta rap, Xian alt-folk, Xian techno. There are also scores of Xian pop novelists writing in every genre. Also, there’s fundie comic books and teen magazines and clothing lines.
I hadn’t heard of any of this stuff. I mean, I sort of knew that there was a parallel fundie culture to mirror my own, but I had no idea it was so large and complex.
Food and cooking. Being able to appreciate food and to understand where it came from and how it came together.
Intelligent conversation.
Maybe just rap, I don’t know about the gansta part. 
sex…
Sex – people who aren’t having it still are aware that other people are having it.
Same with rap music and food/cooking.
The whole current pop culture scene - who’s hot and what they do when they think nobody’s looking. For instance, today I had to ask in another thread if Whitney Houston quit music to be a crackhead. She’s somebody for whom I have a mental image of the sound of her voice, but I couldn’t tell you what she was singing or when. She, and everybody like her, flies under my radar.
I couldn’t pick Britney or J-Lo out of a lineup. Not only is this type of entertainment not a part of my life, I don’t know anybody else who is into it, either.
This is a fantastic example. It’s really like a doppelganger world, and I’ve only seen the very tip of the iceberg, myself.
Soap operas–If you follow them, they become a real world to you. If you don’t, you don’t know anything about them.
Musicals–People who go to them know who’s doing what and what’s coming and who did what and what’s opening where and can recite every role every person played and can identify a lot of one name people (Harvey! Nathan! Betty! Chita! Rita! Patti!).
Bluegrass. It’s really a very niche music.
It’s all I do, and a major part of my life and the lifes of those I interact with socially and professionally. Yet most people say “Bluegrass? You mean like country music, but fast?”
Yes, but the creation (the beat) comes first, then the mixing. 
Freemasonry. In some towns, the only people I know are Lodge Brothers. It is a nice feeling.
The whole Star Wars/Star Trek fascination. I know a couple folks whos lives revolve around everything that has to do with the movies/TV shows.
eating disorders.
before I had one, I thought they were pretty darn rare. The kids in my high school all ate lunch like normal people and all teased me for being weird. Even in all my dance communities, we’d go out to eat and all the skiny dancers woul have dessert (and not one would disappear to the bathroom afterwards.) Around senior year, I discovered a message board where it seemed like EVERYONE had an eating disorder and those who didn’t had stories from when they were younger. Suddenly, I was pretty sure that everyone in the world had a bit of an ED but some people just had it worse than others.
In college, when I finally pretty much hit rock-bottom and people I didn’t know were begging me to eat something, it seemed like everyone wanted to tell me about their experience and how much worse they were than me. And if someone didn’t starve or purge, they had BED or COE. It was everywhere. That’s one reason it made me so happy to come here and hear things like, “I don’t understand how anyone could do that.” and be reminded that there are still people out there who never counted calories or cried because they were expected to eat a normal-sized meal.
I’m a scientist. I live and breathe science. Since at least the first grade science was my favorite subject in school. I majored in a science (biology). I work in scientific research. The vast majority of my coworkers and many of my friends and aquaintances are scientists or engineers, some of whom are much more knowledgeable than I am about scientific matters.
It always surprises me then when I sometimes run into people who seem to think science is this weird esoteric religion that has no bearing on the vast majority of people’s lives, and indeed most normal people can’t even understand it so why bother trying.
Reading. I’ve heard about people that will go for years without reading a book. Now there have undoubtedly been days in my life when I have gone twenty four hours without reading (although I can’t recall any such days). But a week without reading? A month? A year? What are you doing with your time?