It's not about how loud you turn the amp up. That's not what makes it sound big. What makes it sound big is fooling around with different delays and reverb settings.
When I write, I tend to read it out loud to myself after. I'm a very uncomfortable reader, so it creates a distance between the text and me - it is a new way to see it.
People that could yodel always fascinated me. People that could sing loud always fascinated me. So I started trying to mimic at a really young age: 6, 7 years old.