I think it indicates a player who values himself a little too much...
I agree. Lukaku definitely has potential, but people go on as if it has already been fulfilled. He's good and strong, but his positioning and movement off the ball is nowhere near that of an accomplished striker. I was watching Suarez against England, and there was a moment where a hopeful Uruguayan long ball was drifting harmlessley towards Cahill's head, which he duly cleared. But Suarez had made the run behind him regardless, in anticipation of an error. Later on he'd make a similar run which ended up in a goal, and all because he constantly sees opportunity and spaces where others see none. Usually, it would be unfair to compare a player like Lukaku to Suarez at this stage in his career, but if he insists on acting like a world-class forward in terms of his expectations for wages, champions league football, gametime etc. then he really needs to start identifying his numerous deficiencies and acting like the player he thinks he is.