I have to choose the FireRed and LeafGreen graphics. The Ruby, Sapphire, and Emerald graphics were great and all, but I personally thought the sprites and visuals (which mostly comes from the overworld character sprites) were a little more oversized than FireRed and LeafGreen's, which I thought were the right size for the game (the textboxes and the colored text looked better than the textboxes and typical black text Ruby and Sapphire had, also). Though, in my opinion, it was about the same as the Ruby and Sapphire graphics, only improved and modified.