I was always drawing as a kid, and coming up with stories while I listened to music on my downtime. I never wrote them down, just told them audibly to myself over the music.
Did that for years, I was pretty sheltered from the current (at the time) TV and media stuff so I usually just listened to a ton of radio dramas, (they were safe or so my parents decided.
As a kid I also read a lot of Garfield, Calvin and Hobbes, and Peanuts so that had a big influence later on.
As a teenager I found a bit more freedom in what I could watch and read, so my biggest influences became Godzilla, One Piece, and Dragonball.
When I finally read the original One Punch Man by One (not the one with art by Yusuke Murata) I realized I had zero excuse to not use my art to tell stories I'd long ago created.
My inspiration(s) are pretty scattered and it took me awhile to even try, but I got there eventually.