Ah, this is such an interesting topic to discuss. I started something similar to this the other week about something small you did that has impacted your life. It's a bit different, but the same concept. It's so weird to think about the small things that could lead to such a massive chain of events...
For me, I hope to change the world by helping to make games that people really enjoy (Maybe even some "Average Joe" software). I also hope to keep making some amateur MLP music to please the fandom. These things come with a type of fame that, like anyone, I would most definitely enjoy, but more importantly, I just love the feeling of entertaining people and knowing that I have impacted their lives in some way, such as how you were discussing. The feeling of making someone else happy through my work is probably one of the best feelings ever. I know how it feels to get impacted emotionally by a simple game or song, and I want others to get that feeling.
Currently, I don't think that I have made much of an impact on the world. It's a bit sad to think about, but my future looks bright, and I hope to accomplish my goals and dreams no matter the hardships that I must face.
@, How would you like to change the world?