You could be excused to think that Villon owns his place in history simply due to his lifestyle and reputation of outlaw, coupled with the fact that, for long, not many poets from the Middle Ages were republished (and so who did we have to compare him to?). And indeed, the myth Villon has become so deeply entrenched that, even some of his poems ended up by being merged to his criminal life, even if unfairly and wrongly. For example, his widely celebrated 'Ballade des Pendus' ('Ballad of the Hanged') is said to have been written in prison and while he awaited execution (for theft -again- and yet another street brawl), a claim which is rather dubious given that it doesn't deal with a coming to term with a sentencing but Christian charity, besides not being his only poem hinting at the gallows -far from that! Ha! But never mind. Such myths, after all, contributed to add to an already colourful life.
The thing, though, is that Villon was far more than a petty criminal. True, he widely used the Parisian slang of the poor and then criminal underworld; his verses targeting people who would have been lost to history had they not been named in his 'Testament' otherwise (e.g. fellow delinquents, prostitutes, magistrates, law enforcers, clergy etc.). This, of course, and besides being poetry written in medieval French, can make him very difficult to understand indeed for a modern reader (thank goodness for editions accompanied with explanatory notes!). Yet, his reputation and lifestyle shouldn't fool us; for Villon truly was a maestro of the ballade and the rondeaux, well-established forms in his time perhaps but that he delivered with his own, unique masterful stroke and twist.
The fact is, he used these forms as a way to cock a snook at pretty much everybody (including himself, for his derision could be self-deprecating too) and it's what made him original, or, at least, as distinctive as his evocation of poverty, decline, a life on the margins, and, of course, death.
Even more revealing (and interesting!) is that his poetry was not all about sarcasm and piss taking either. He was, after all, a complex man with his own idiosyncrasies; telling about painful unrequited love while lauding prostitutes, having contempt for authorities and conventions while longing for respectability and acceptance, or, again, exhorting others to mercy and charity while indulging himself in some venomous attacks and cruel railleries. For all his contempt, bitterness, and ridiculing, he could also show himself particularly sentimental too (e.g. 'Ballade pour prier Nostre Dame' about is mother...).
In the end, though, if Villon surely was an 'enfant terrible' of French poetry, one who had nothing to envy to the 'poètes maudits' who would succeed him albeit centuries later, his lifestyle and final demise (he was ultimately pardoned and so escaped the gallows, before disappearing God knows where) shouldn't obscure his obvious talent as a poet. He might have been a gaudy satirist and cruel banterer, mocking from people to conventions and even himself (although not without some sad bitterness) yet there was no one who wrote ballades and rondeaux like he did. He overshadowed all his contemporaries... and rightly so!