I think I first saw Jan Jan in the Belgian designer thread here on c-t and since then have become obsessed with him, his style is basically what I have been searching for myself for quite some time, and I had that ''aha!'' moment you get when you find something you feel like was made for you. A lot of designers (or a few at least) create a great silhouette comparable to what JJ does, as someone else said somewhat similar to Yohji, but what sets him apart are his fabric textures, they have so much character and really make the garments come to life for me whereas a lot of other people creating a similar silhouette are using a lot of overall less interesting materials. The combination of his fabrics and his silhouette give it a really cool almost religious appeal which I think he addresses in a couple interviews, it's just a really great jizz on the whole and when you see him and hear what he has to say it feels quite authentic. I also think his emphasis on natural fabrics is great. I don't own any pieces yet but there are a couple I have been eying up and planning to pull the trigger on as a reward to myself as soon as I finish University this winter.
Here is a video of him showing some of his fabrics and garments to someone, quality isn't great but you can see some of the awesome textiles he uses.
https://www.youtube.com/watch?v=8gXvrgrr7aMSome cool smaller interviews I've found..
[url]http://coffeeklatch.be/en/interview/2011-09/2/jan-jan-and-piëtro[/url]