Monte Vista is my number one of the worlds I've downloaded so far. The Tuscany feel and look of the world are just wonderful and it's soooo pretty! This is a world that was really created with care by the team
I just recently downloaded Sunlit Tides. I was hoping to find a beach themed world that didn't crash my game like Isla Paradiso does. Jackpot! Sunlit Tides is a big world and it really has a Hawaiin feel to it. I'm enjoying one of the premades in the world (her name is Kaila but I can't recall her last name right now) and just having a great time exploring. Sunlit Tides would be my second recommendation.
I do like some aspects of Dragon Valley, in fact, I like a lot of things about it and really does have that fantasy feel the OP mentioned. However, the world is really dark and that bothers me after awhile.