Company A is a symbol of what I don't want in life. Ugh... I want to help build something, make it big and make it part of myself. I don't want to step into something so big and already established, I want to help create something big. I need that sense of achievement in my life right now. I don't want to merely maintain something, I want to create something. You see, I need that room for growth right now, and I know that you may not understand it right now, but it's like us. We are creating something here, the two of us, and it's awesome. I want that in my career too... So I'm sorry if you don't understand this, but I am not applying at company A and you just need to try and understand me and understand why.

Oh, you do understand me you say? That is so awesome of you. Hey, want to go create something in the room right now? You do? that is great!

Lol... that last part is a little immature, but I hope that the first part helps you!