He is quite possibly the least lazy player I have seen in an Arsenal shirt. It's not just the running and commitment to put in that defensive shift. He is always looking or scanning with but of course especially without the ball. Always, putting a full shift in, and leads by example. Often organizes the press intelligently.
I have seen him compared to Ozil, but in truth he is the more complete player. Ozil could probably pull off that killer pass more consistently.
Speaking of which, he is not always got that consistency yet. That is what he needs to establish.