Earlier quoted context omitted.
Despite the Peter Jackson movies, The Hobbit was actually written as a childrens' story rather than a grand epic. I'd wager a lot that the cartoonish nature of his pictures was an accurate reflection of how he saw that story. If you haven't seen the 1977 animated Hobbit film (often called Rankin-Bass after it's creators), you're doing yourself a disservice.
Online you can find a PDF detailing the differences between the pre-LotR Hobbit and the second edition (Tolkien rewrote comparatively small parts of the Hobbit to make it fit and actually didn't expect the publisher to release a second edition with the changes, hence the preface to the Lord of the Rings and Bilbo himself apologizing for "a different version of the story"). You can even see the "Hobbit-esque" writing…
> hence ... Bilbo himself apologizing for "a different version of the story"
I thought that showed the Ring's effect on Bilbo, something Gandalf talked about too, and which is important to LOTR.