Best game ever made, technically and In opinion.
From the start you pick your class and each race has it's own passive skills(like dagger plus 5 or arcane resistance or Immunity to fear) this in the beginning is really unimportant but when you reach 70 they really do matter because now you can beat Warlocks cause you can avoid the fears.
From the UI Blizzard really did an amazing job making the game as user friendly as possible , highlight anything with the mouse icon and it'll tell you what it does. This game is not intimidating to play but as you reach higher levels you keep learning new things every day.
The endgame in WOW is impossible alone, if you looking for a good guild or wanna progress in the game it's highly advise to not act a fool in your early levels cause people will remember you and not take you serious , this kinda sucks about the game as people can be really unforgiven to even little kids.
I advise anyone with a PC able to run this game to try the demo atleast cause this game is really good and well made. the battle system is perfect for a MMORPG and fighting in front of Ogrimmar never gets old.
Blizzard really pulled a rabbit out of a hat with this one.