PC USStraight out of Mo- uh, oh wait. Um... Ebonheart, I guess?
I personally prefer warm, beautiful and quiet lands, therefore
1) Auridon
Besides of the beautiful landscape I especially like a part of the music there. It reminds me on a ship sailing off to an archipelago far away ... Khenarthi's Roost has a similar flair.
2) Malabal Tor
I like in particular the dense vegetation there, which make me feel like entering a deep forest.
3) Greenshade
I love the remoteness and natural beauty of the zone. It reminds me a little on Nagrand.
What is your favorite zone and why?
I personally favor Rivenspire the most. I like the darker atmosphere and I love how the crafting stations and bank are close together in Shornhelm.