I draw because I like it
I imagine lots of things in my head, like creating scenes for my own movie based on my favorite game, short films about video game characters or other things, the personalities of my OCs, and lots of other stuff.
Drawing allows me to bring what's in my head to life, and I enjoy spending time on it when I feel like it. I like to start with an idea in my head, do it for the first time, try again, and improve.