Complexity Zoo

I used to be afraid that I didn't have that much knowledge in the domain of these types of things...<p>- but this seems like a knowledge of a worker, not a owner... at least at this of a level, no offense - but this seems like early optimization for most anything except for those who are getting a PHD in it; I would say there will always be lower hanging fruit in my life than these things..<p>: i am probably just showing my very lack of knowledge here..

Wow,<p>Having only dabbled at the beginning graduate level in this, it makes me wonder what actually interesting things come out of describing more and more classes of this sort? I know groups in group theory get classified in an organized way. These classifications seem much more arbitrary...