Why the heck does it matter? I'm assuming you are a younger girl heading for your teens and looking for some friends. I get it. None of my friends really understand what I'm talking about half of the time. Or they just think it's weird. But I still love them.
I play video games. I like cars. Sci-Fi is my favorite genre. I love animals. Not all people are going to be a mirror image of you. You don't need your friends to like everything you like. For example, my friends who are girls don't like any of those things. We normally discuss something different like how they're doing, books, and girly stuff. But I also have friends who are guys, and they would like to ditch some of those things. I can talk to them about video games, weapons, and cars. I have a great time with all of them and love them all dearly despite the fact they are different from me.
Treasure your personality and keep it. You are you and no one else. You are special and beautifully made. But make sure you are loving your neighbor as you love yourself. Maybe you hate MLP with a passion, but your friend enjoys it. Talk to her about it. It brings her joy. Sometimes you have to make those sacrifices. For ANY kind of relationship (Parents, siblings, friends) to last you must do so.
And no, you are wrong. People do care. :)
(Little Red Cessna)