It'd be too much pressure. Another beauty of taking on an off-beat job is that you don't have to deal with a lot of the bureaucracy and frustrating distractions that interfere with getting work done in a corporate office setting. Now, I have deadlines and I have things that I have to meet. I work at my own pace and my own hours. If I'm having a bad day and feel like screaming at the cat, that's cool.
Nobody really cares.
When you're doing your own thing, whether it be working as a flight attendant, model, or greeting card writer, you're making use of a talent that you would not be able to use in a normal, corporate setting. Taking on an off-beat job is not all wine and roses, though. Most importantly, it can be insecure. You may not receive benefits, like health insurance, and there will be times when you're not able to make enough money to support yourself because the work is not there. Just because you have a good month or two, and you're on your own selling baskets or whatever, just put the money away.