Terrain: Timberline Falls, Sandswept Isles, Malchor's Leap
Meta: Dragonfall, Auric Basin, Domain of Istan.
For solo play: Bitterfrost Frontier, Verdant Brink, All of Central Tyria.
I like artworks of Crystal Desert maps, but berely go there because of low reward. Color barance of CD is too vivid for me, core maps are just moderate and natural.