Jonathan Thurston has had a brilliant career and is one of the best halfbacks I've ever seen play. I've though seen play in person - Steve Mortimer, Tom Raudonikis, Kevin Hastings, Peter Sterling, Allan Langer, Ricky Stuart, Andrew Johns, Jonathan Thurston and Cooper Cronk as the big name half backs 9in my time following the game. For pure on field ability Andrew Johns was the complete package. He could organise like a Sterlo, he had a passing game like Ricky Stuart's, he had pace off the mark similar to Turvey, he had a good short kicking game like Alf's as well as a good jink and step, and he had the toughness of a Tommy Raudonikis, whilst he could tackle like a back rower. Add on top of that he was a quality goal kicker.
JT possesses many similar qualities, but his defence is solid but not as good as Joey's. No knock on JT he is a great, but so far Andrew Johns is still the best halfback I've seen play to date.