The British actor plays the lead role of Bilbo Baggins in the Peter Jackson adaptations of the JRR Tolkien novel, starting with The Hobbit: An Unexpected Journey.
He explained that he wanted to be successful in a top film, having starred in little-known projects in comparison such as The Good Night and Nativity.
"The main thing I'm focusing on, is that I want to be good in the films," he told Radio Times.
"'Cause I've made a few films that only 300 people have seen, but at least I'm proud of them. And I wouldn't have unmade them because they didn't make money.
"So my first judge, my first critic, is me, as with most of us who are creative about what we do. And I want to like The Hobbit. And of course I want zillions of other people to like it too."
Talking about the Bilbo Baggins role, he also revealed that he happens to have the same head measurements as his predecessor Ian Holm, who played the character in the Lord of the Rings films and will appear briefly in The Hobbit.
"When I was having my face cast [for prosthetic ears], I was told that the dimensions of Ian's and my face are almost identical. Which they thought was a good omen," he recalled.
"I think he's got a tiny bit of a wider bridge of the nose. But all our measurements are kind of the same."
Freeman added that he may see his life change drastically when The Hobbit arrives worldwide, saying: "At the moment I can go places in the world where I'm unmolested, and that's kinda cool.
"Whereas there won't be anywhere in the world where this trilogy isn't shown, I guess."
The Hobbit: An Unexpected Journey opens this Thursday (December 13) in the UK and debuts on Friday (December 14) in the US.
Watch a TV spot for The Hobbit: An Unexpected Journey below: