It's not an ideal lifestyle, and I'm sure you're aware of the drawbacks (insurance, security, travel, uncertainty etc.), but it offers considerably more freedom than a 9-5 (you can always turn down projects if you want more time to yourself, though I'd recommend that instead of saying "No" straight away you do so implicitly by pumping up your rate to the point where you'd be thrilled to take the job if they agreed) without a lot of the risk involved in a startup, and it could allow for a much easier transition towards starting your own business if you decide to take the plunge.
You'll find that Real Job offers emerge on occasion from contracts that you complete, and you may even stumble upon something that's lucrative and interesting enough to take, if you're not loving the hired gun lifestyle...