I personally love WoW. I have played it since I was 6 years old (I'm 15 now). Some things that have happened that I was not impressed with, such as the Cataclysm expansion. I love the atmosphere and the landscapes. The areas as a whole are amazing and empowered with lore. Some areas are not such a funfest (For me, Blasted Lands) but some are great fun (For me, Redridge Mountains). The different races and their abilities are amazing and really cool (Night Elves and their Racial Ability: Shadowmeld). The classes are full of variety and are each unique in their abilities.
I give World of Warcraft a 9.