An interesting idea. Definitely a stimulating topic, encouraging some deep thought, or none at all, depending how many posts you read.
I guess I'll give it some thought. All throughout my life, I suppose people have considered me somewhat of an Animalia. That's hardly extraordinary, though, and I consider it somewhat uncivilized to define someone through their commonwealth, so I've considered myself more of Chordata.
As far as how I look, I'd say I resemble a Vertebrata. I think I get that from my mother's side of the family. On that note, my father always demands: "get a hair cut, lest I look like a Mammalia," whenever I see him. I do suppose my hair has gotten rather long. It didn't affect my school life, though, as when I changed schools I quickly found a group of fellow Theria. They accepted me without much trouble, and I made a lot of friends. As I grew, and made my way into high school, some of my friends drifted a bit apart, and I often found myself feeling inferior to another class of people: the Eutheria. They knew I was one of them, but they really lacked order. A lot like Primates, really.
I realize I'm not in much of a position to judge them, though I did feel rather left out. Later, I found some other people who were likewise rejected, and realized we actually had a lot in common. As we spent time together, we could hear the chatter in the hall ways, the snide remarks of our fellow students, calling us subordered, and Anthropoidea. It hurt for awhile, but we were all just young kids.
It was just about this time that I began developing tendencies that often resulted in wild nicknames. I can only remember one, and it's what my teammates would call me in Soccer: Hominoidea. At first, my family mistook their chants for Hominidae, which I think is understandable what with them listening from the stands.
That's not all though, as a lot of high schoolers, even now, go through a phase where everything is "gay." Well, like most of my friends, we were not spared. I often heard people refer to me as "Homo." I told myself they were jealous of my genius. Whether it was true or not really isn't my call.
Now that I'm in college, I don't really have to deal with all that hustle and bustle anymore. It's really refreshing. I guess what I'm trying to say, and sorry for boring you with this account of my life (Though I feel it necessary to properly narrow down my definition), is that you could simply define me as a sapien. Just your normal, every day sort of guy.