Great thread and welcome Simplet
I would say that it's about two different things :
I feel like his style of tennis is, at high level, a permanent gamble. His game isn't about consistency (like Nadal or Djokovic who play all year and match around the same style and level of tennis), it's about variety and inspiration. With all the up and down that you can experience with this style in a match, or in a year, but it's hard to say for now with his injuries. Plus he has a so strong physical advantage on many middle players that he can win them just on it. Maybe that's just me, but I don't think that there is many players right now on the tour that can pretend to force him in a gamble. But obviously, when it comes to them or if the match circumstances command it, he will have to put everything on line to win and to produce some unbelievable points.
The other thing is his character. You can feel on the court that the guy is really impatient and frustrated when things doesn't go his way. But he isn't a headcase like Safin. He won't explode right away. Instead he goes for it. Like the last game against Djokovic, he just forces things out by gambling everything away.
But that's what is so great about him
I've just had an idea : maybe you could recall your thread "game analysis" or "Jo's game", or something alike. That's a thread we lack for the moment