Something that strikes me is that while it might be helpful to categorize the various types of entrepreneurship, I think that some start-ups don't fall squarely into a single category. I would argue that Google and Apple most probably started out as lifestyle business (geeks who wanted to mess around with technology), but realizing their own potentials, they start to become scalable businesses. It might even be possible to argue that Google started out as a social business, since the founders actually had the noble cause of "organizing the world's information" and "don't be evil".
With this in mind, it's interesting to think about big business, and see how their motivations have changed over time as they get attacked by market forces and shareholder demands over time.
I guess the next question to ask is what kind of business would you want to be in?