I like fearless characters, people just not afraid to do anything it takes to make people laugh.
My advice is: to try and stay really true to the things that make YOU laugh, as opposed to trying to create a character that you think is funny. Some comedians get into bad habits when they are trying to create something that is not them, and they are trying to write a voice that isn't their true voice.
Comedy is immediate. Comedy is a solo mission. You're all by yourself, up there. And when you're in a film, on a set, it's a collaborative effort. It's about me being a tool for somebody else to create a story and a character from nothing, from their imagination.