It's a fantastic game and has produced many memorable moments for me and friends.
Great game once you get in to it, the "grind fest" is due to change with the release of the new expansion pack, they're completely changing the leveling process in the old world, so it should be more fun, easier and quicker.
Horde, far more mature on the whole then Alliance.
Some classes, are far more powerful, and Blizzard love them more, Druids for example
Play all the classes you can, for the first 10 levels to see if you enjoy the basic style of how they play.
Don't use the
AH to buy things, it's over priced, save your money, you'll get gear through quests / drops and you won't be using it for long anyway. Take at least one gathering profession to earn some money (sell the raw materials they produce on the
Auction
House), take two if you want to earn a lot of money
don't take two that both need to "track" raw materials, skinning is a brilliant money earner coupled with Mining.
Make friends, be polite and social, it will make leveling a lot easier.
"
Remember to take all things in moderation, even world of warcraft"