Is it the way they seem to be able to wear enormous sunglasses without somehow managing to look too silly?
Again, no; you are no one as a racing driver unless you can pull off an utterly ludicrous pair of shades while also appearing to be icy cool.
It is, of course, the way they drive, and spotting the haves from the have nots – particularly in F1 – requires that you look at the most minute details of each driver’s performance, and then work out who’s got it, and who has not.
The way Lucas di Grassi wrestled his shed-of-a Virgin F1 car around the opening laps of the Monaco GP in an almost crazed attempt to keep Fernando Alonso behind him was, for me, one of Those Moments.
He looked well and truly up for it, di Grassi, and in the event it took Alonso several laps to work out a way to get past him, despite being in a massively faster car. And even when Alonso did finally make his move, it looked as if di Grassi was still quite prepared to have a monumental accident before succumbing to the mighty Spaniard.
Jarno Trulli, on the other hand, displayed about as much determination to keep Alonso at bay as you’d expect from someone who’s counting time during the autumn of his career. Trulli pretty much came to a stop and offered Alonso a cup of tea on his way past – and in that instant you could see the difference between a have and a have not.
Under exactly the same circumstances di Grassis looked a) mad, b) very obviously starving hungry to succeed, and c) as if he could well be made of the right stuff – whereas Trulli looked like someone who isn’t, and probably never has been, the real deal. I could be wrong about Di Grassi. At Bahrain he looked wild and ragged, like a driver who was trying a bit too hard merely to stay afloat. But since then he’s got smoother. And faster. And at Monaco, during those few brief laps with Alonso all over his rear wing – under the most intense pressure imaginable, in other words – he looked like a class act. Like a star in the making, in fact. Quite unlike Jarno Trulli.