He acts relatively maturely as long as he keeps getting away with murder when it comes to fouling other players, getting a whistle in his favor every time he goes to the hoop, and travelling whenever he feels like it without ramifications, (via his self-dubbed "crab dribble").
As long as the officials are in his pocket and not bothering his "flow", he's as happy as a pig-in-poop, and gracious as all get-out, (while he's winning) ... but as soon as calls start being made fairly and he gets into foul trouble, (which is about once a season), he throws a tantrum, or stares down the refs with a "How dare you!" look, (that would get anyone else a tech).
Sorry, but I will never respect this guy on any level until the league starts treating him with the same indifference, (or even moderation), that it does his opponents, (which will not happen in this century). It's easy to be magnanimous when things are going your way, and that's the only change taking place with Lebron, not some sudden transformation into maturity.
Please.