I've been watching YouTube on and off for years. I didn't get super into the personalities until about a couple years ago. I think it was Shane Dawson that started it for me. He was the first one I followed consistently and I found myself eventually watching any new thing he would post. Over time I started following more and more YouTubers.
I have lacked at finding any sort of career path in my life. I basically quit anything I do. I always thought I could do what the youtubers did, but never thought to actually DO it. One day I was watching a video by Amber Scholl where she had reached 1m subs. She cried and told about how a year ago she thought she was a failure and she had like 4 jobs to get by. She made the choice to throw herself into youtube. Her quote that got her through it all was, "What if it doesn't come true? Ah, but what if it does!" I live by this now. Every time I have doubt I think of this quote.
After that I made the choice to just do it.
Why do I do YouTube?
Well, I love it so much that I couldn't dream of quitting. It combines everything I love. Creativity, writing, performing, community. I was made for this.