Your post reminded me that I haven't worn this one in a long time, so I'm reacquainting myself as I type! I enjoy Duc de Vervins, and find it to be a fresh, greenish, woody fragrance. It comes across as rather "traditional" and often gets compared to Drakkar, which I've never tried. I think its equally wearable in formal as well as more casual settings. It used to be available at Perfumebay @ a discount, but appears to be sold out.
Hope that helps a bit.