The mighty adorable Carlos Acosta is at the London Coliseum this week in all his might and all his adorableness - four times, you may like to know, he appears without his shirt on. This is relevant, because it’s not the preening bare-chestedness of a showbiz egomaniac like some I could name, it demonstrates the desire of a man to shed trappings, to be himself at his most unadorned, adorning the art he loves: classical ballet.

My great-grandmother used to say, "In the fall, leaves fall," meaning that as the weather gets colder, people die. The Royal Ballet has had leaves falling all year, and in the height of the (ha!) summer one of the most tenacious, and most beautiful, finally fluttered down. Leanne Benjamin, a principal since 1993, retired in the role of her choosing, Kenneth MacMillan’s Mary Vetsera, a crazed, sexed-up nymphet with a death-wish.

Two world premieres in one night is almost more pressure than anyone can bear - choreographers, commissioning company or audience. Still more when the spotlit dancemakers are probably the two top Western names in the art, Alexei Ratmansky and Christopher Wheeldon. Everyone, but everyone, expects masterpieces.

With a reputation as the prince of unflinching emotional catharsis, Kenneth MacMillan emerged from the Royal Ballet’s triple bill marking the 20th anniversary of his death as a lord of lyricism. The new bill presents MacMillan three ways, his academic instincts, intellectual imagination and emotional vision - a bold versatility you (whisper it) almost never see from today's choreographers.

The Royal Ballet’s autumn season began on Monday, but this was the eagerly awaited Swan Lake. Natalia Osipova, ex-Bolshoi, now principal with American Ballet Theater and the Mikhailovsky in St Petersburg, was making her debut as a guest with the Royal Ballet, partnered by Carlos Acosta.

Male dancers are a puzzle to British audiences, where they are an uncomplicated, taken-for-granted treasure in Latin or Slav countries. I point this out gratuitously, as it's a point that wasn't touched upon by Melvyn Bragg's film about three iconic men of ballet, Rudolf Nureyev, Mikhail Baryshnikov and Carlos Acosta.

Oberon in Frederick Ashton’s The Dream was the hurdle at which the ferociously promising young Sergei Polunin refused when he quit the Royal Ballet last week, and whether it was the deceptive complexity and difficulty of it that caused his sudden exit, last night’s opening gave his replacement, the brilliant Steven McRae, such a run for his money that it wouldn’t be surprising if the role had indeed left Polunin in a blue funk.

“Over the top” is a curious expression. Originating in World War One, to mean going over the edge of a trench and into battle, it has altered by degrees to mean anything extravagant or outrageous. And Gloria, which is arguably Kenneth MacMillan’s masterpiece, has both the literal and figurative meanings of going over the top layered upon each other.

For most dancers the first base is to get principal roles. For a star like Carlos Acosta, second base becomes urgent: to find the career path beyond classical ballet. Like Sylvie Guillem he seeks out a new contemporary dance path to fulfil, being still full of glorious physical vigour and still well under 40. But it turns out to be about wise investment.

Carlos Acosta is not just a superstar dancer with the Royal Ballet and around the world, he is an avid reader - and indeed writer. After writing his autobiography No Way Home, he has also scripted dance shows and is now writing a novel.