I use RPG Maker VX Ace and I have been using some of your tilesets. (I fully intend on buying and using more as finances permit every payday! :D) I was thinking though: I adore everything that you have and ended up coming up with a couple of ideas! Not sure if it would fit with your "Legendary Palaces" series, but something related to spiders/Driders in a dark fantasy style like the Legendary Palaces would be very neat! So would a true Ghost Town tileset (abandoned, ruined, somber/eerie fantasy town); not sure if either would be something you'd be interested in making eventually, but it never hurts to ask!