I really don't know what these guys are getting excited about. There are a few new custom and original tiles that are good, but my fondness for Link's Nightmare had nothing to do with the visuals. The SB palette is better than the old one, but on the whole I don't find this to be an appealing mixture of tiles.
Also, there's something here everybody should know: the very first combo in the combo list is reserved for a FULLY TRANSPARENT tile with no properties. ZQuest uses this as the default whenever it needs a space on a screen to be "empty."
It's been this way for several versions. Some of the older tilesets were around before this was implemented, but being a new tileset, you really should change this and reupload, Exate.