This is a topic I feel very strongly about and I hope I'll be able to give a clear answer, because - when I get excited about something - I start going on and on and on about it and I get very philosophical xD I'll try to avoid that. Promise!
I HATE labels! Humans are all unique and there should be no labeling if not one: ME!
I am who I am. No matter my sexual orientation, my color, my beliefs. The things that make me different and unique make me beautiful. I don't need to belong to a group of people to be accepted, I need to meet different people to be able to grow, without differences we are nothing, we're not humans!
I think kids got it right: bring a kid to a park (your kid or the kis of someone you know, don't kidnap anyone for this experiment) and let it go play... They will play with whomever is there... They're not going to ask the other kids for whom they're going to vote, if they are Vegans or what's their heritage. They're not going to give a damn about what they wear as long as it's comfortable... They just label each other as "stuff i can play with" and everything falls in that category.
This is why I am not okay with Tumblr and with lists like THIS... Why do we do this to ourselves? If we really want to be accepted for who we are, why do we spend so much time trying to put little pieces of ourselves into different boxes? I don't understand it.
So who am I? I am ME! I don't have to tell you which age group I belong to, if I'm democrat, liberal or republican, if I'm white or hispanic or black,... if I'm gay, het or any other if that definition that are in that list... I am who I am, talk to me, see what's inside of me and then make your decision about me. Don't separate me into labeled boxes until there's nothing left of me. Let's go to the park and play! All these letters don't matter, they never did and they never will! The only thing they'll do is making us grow apart and loose our individuality.