Always steals the show with his performances.
I've read Bogart biographies, and his upper lip was definitely damaged. It was partially paralyzed and stiffened. Giving him those distinctive facial movements. And not a classic lisp, but he did say his "s's" with a kind of "sh" sound.
And that was the way he talked in real life, too.
Actually made him a star, due to his distinct speech and tough guy look.
Despite the fact he came from a prosperous family, he seemed like a guy who had grown up on the wrong side of the tracks.
Probably my single favorite actor ever was James Cagney. I could watch ‘The Roaring Twenties’ (with Cagney and Bogart) a thousand times.