>>118779230It's not that John has no personality, it's that he has a very rigidly-defined one. He's former US military, so he's basically a grunt with a power ring. It's a personality we've seen before, millions of times.
Being black is, for him, used in place of an identity. It's "enough" for the black green lantern to just be an army guy. He never needs to stray out of that box, even though the character is dreadfully boring without doing so.
