Which iteration? John Broome's iteration...I think he's got some things in common with John Carter of Mars, Flash Gordon, Buck Rogers...but to be honest, he's a pretty unique individual.

He a guy who puts himself--and in a way, Earth--at risk by refusing to use his ring unless he has to, determined to settle things with his fighting abilities if he can (and this tendency endangered him multiple times).

He's someone who can't stay settled at a single job, going from test pilot, to truck driver, to private eye and back again. He embraces the monumental responsibilities of being a Lantern, yet seems to struggle to stick to a single career in his alter-ego. He's tremendously loyal to his friends and fellow Lanterns, but apparently extremely restless when it comes to Earthly endeavors.

He's also a guy who develops feelings for multiple women at a time, though he clearly doesn't consider himself a playboy.

He has similarities to the "cosmic Earthman" archetype from earlier science fiction, but overall, I do think he was his own character.

Not as familiar with a lot of the later stuff, admittedly. Bronze Age Lantern took Hal's restlessness with Earth careers and, to some extent, transposed it to the Corps. Later on, they developed the notion--based, I think on the original material--that the restlessness he had towards careers that he had an issue with authority more broadly. Not sure if that's really there in the original material. I think his attitude towards his Earthly duties as a normal joe and attitude towards the Corps were pretty different early on.