Leroux: Interested in, okay. But would you be jumping up and down out of joy and happiness if they came to GOG? ;)
Their newer games would probably create more buzz. Surprisingly, Bioshock was DRM-free in the Humble Bundle, so that's a first indication that they could have become more open for distributors like GOG, but apart from that, most of their games are pretty much Steam exclusives on PC, from what I've seen.
Callahan's Crosstime Saloon, definitely as it's a doggone masterpiece. Instant purchase would it come to GOG, if only as a token of support as I own this boxed.
Hell & Bureau 13 I would buy for the customary 5.99$ as well, they are interesting games and remnants of days sadly gone by.
Ripper & Dark Colony might be more "wishlist-wait-for-a-sale" stuff.
Lula would be worth the couple bucks for remembrance of high school shits&giggles. In a bundle with Biing! maybe ? :-D
Of course their newer games would generate more sales, as they're more shiny, and people like shiny stuff.
But as I don't give a fuck about shiny, I keep hoping for actual interesting-to-me releases on here...