Hoenn and Sinnoh for sure. I've never understood the fanatism behind Kanto and Johto, as I found them rather "meh" as far geographically and Pokemon-wise. But then again, R/S/E were the first games I ever played, so I'm biased in Hoenn's favour for sure. XD At any rate, I cannot wait for a Hoenn re-make, as so many of my favourites are Hoenn and/or originally from Hoenn but were given evolutions in Sinnoh/Isshu. Speaking of Isshu, I like it thus far geography and design-wise, but Pokemon-wise it doesn't look too promising to be quite honest...