Wotlk is a great game! It's has amazing gameplay! The new land, Northrend, is just fantastic!
It made me want to play wow again, after some moths away, and is the best expansion for wow made so far.
It has tons of new quests, and this time, different, and interesting quests. Blizzard has added much more humor to the game, and this makes it much more fun to play. And the new places, in Northrend looks amazing, and is much more detailed than before.
Well, as with the vanilla World of Warcraft, and The Burning Crusade, the history is taken from Warcraft 3 (Also made by Blizzard), and this time it's about the lich King, Arthas, who wants to take over the world with his undead army. You're the one who's going to stop him!
The graphics in the game has also been improved, and looks astonishing! It is as before, cartoon-like graphics, but it has been improved. It also has much new, and better music, and sound effects. Like, now more NPC's (Non-player-characters) actually make sound when they say something.
New and interesting NPC's and mobs have been added, and there are as expected a lot of undeads in Northrend.
All in all, it's a great game, with good gameplay, graphics, sound/music and storyline, it deserves a big, clear 10!