The Mikhailovsky Ballet is full of surprises. Predictably for a Russian company it brought a gala programme yesterday - unpredictably, it brought a rare example of St Petersburg 19th-century ballet comedy and a new commission of contemporary ballet. Neither of these is box office, so how refreshing is that? Then there were the thongs-and-glitter pas de deux of the strenuous 20th-century Soviet athletic style, and a classical jewel from Sleeping Beauty, and a wholly delightful court polonaise from a Glinka opera.

It would be tough for any Russian ballet company to come into worldly, balletwise London just ahead of the great Bolshoi, but the Mikhailovsky Ballet make a very pleasing impression in their first week at the Coliseum with a pretty and historically interesting Swan Lake and a gently antique Giselle, and dancing that more than most underscores the rare pleasures of period style.

In the middle of the pulverisingly loud and utterly thrilling experience that is Hofesh Shechter’s new production Political Mother, I wished suddenly that all dancers could come and see this piece, see what clarion theatre dance can be. If the theatrical thread often thins almost to vanishing point in some of the more mediocre ballet productions that turn up, this work is a positive rope of theatricality, thick, hard, massive, a slab of incredibly loud music and incredibly fierce, reflective emotion.

The annual tradition that is the Royal Ballet School Matinee at Covent Garden isn’t just some prestige indulgence for the nervous parents of ballet children fortunate enough to survive the militaristic training and dogged enough to want to continue into the beckoning career where there are such frail job prospects. It is a place where the gap between a good student and a potential artist comes clear through the sheer size and one-offness of the occasion.

One of the most difficult questions to answer is what makes a great performer great? So much that happens on stage takes place in an eye-blink. Dancer A is "better" than Dancer B, but why? Critics talk about "line", about "extension", about how dancers use and shape space. But it is hard to see shapes in words. Now portrait photographer and installation artist David Michalek has, with one deft blow, solved this problem.

Spain and Venezuela are two countries divided by a common language - in dance and music, as well as in culture. Hence the hook for Paco Peña’s latest production, Flamenco sin fronteras, which while wearing a faintly anthropological air also packs a lot of ebullient performance skills and talking-points. Contrasting “high” Cordoban flamenco (and in Charo Espino and Angel Muñoz, Peña provides two of the most refined dancers to be found in any style) with gutsy, African-influenced flamenco from Caracas, makes for a direct comparison of sex and allure, earth and fire, of relaxed, open-hipped, four-square Afro-Latin drumbeat and the tautly strung, buttock-clenching, almost oriental mysteries of Iberian flamenco-guitar rhythm.

Hans van Manen does basic instincts in ballet better than anyone alive. The Dutch choreographer, nearly 78 and far too little exposed in Britain, is a near-contemporary of Kenneth MacMillan, another specialist in sexual relations, but where MacMillan is fascinatingly drenched in guilt, Van Manen takes a bold, guilt-free stand. Grosse Fuge, which Birmingham Royal Ballet revived in the Hippodrome last night in a smart triple bill to entertain all tastes, is all about mating display - four men in black oriental skirts and big-buckled belts, four women in beige Playtex-type corsets that give them mumsy boobs and look unusually sexy.

Within two bars of the overture starting, the first flashes could be seen. English National Ballet’s arena Swan Lake at the Albert Hall - they make no bones about it now - is intended for people who rarely go to the ballet. Actually it is in many cases for people who have no compunction about talking and taking pictures through the ballet quite routinely.

A second coming for Michael Clark's recent Barbican commission Come, Been, Gone. Eight months after the London premiere (on which I opined unenthusiastically below last October), he has added another 20 minutes of choreography, they said, with new costumes and artworks. The revision is also now artfully retitled Come, Been and Gone. Not comma-Gone. And Gone. Makes all the difference.