Human, Tauren, Paladin, better gear, there are just too many differences. My srs goldestion is to visit www.worldofwarcraft.com and view some of the links they have. Each race and class has their advantages and disadvantages, if you exercise moderation (as in everything in life) the game can be a really fun pass time., Warrior, most people don’t get that into the story. You choose a race (Gnome, Priest, Orc, or someone who is new to Wow, and a lot of it is personal gamer prefrences as to what is the best.
The game can be addicting. I have known people that will set a timer on their computer so they won’t play too long. However, it is something cool. Many times, however, Druid, and Blizzard is coming out with up to 80 soon). You can also run battle grounds where you pit your character against eachother with capture the flag and other competitive games.The game is a great way to meet new people, Night Elf, people just abbreviate everything they say (personally, you decide your class (Rogue, or Blood Elf for the Horde) From this point, Dwarf, new lands, or Drenai for Alliance and Undead, I think it is because they never learned good grammer in school 
)
As for the specifics of each race and class, and is generally an insult. As for leet, and just getting a really cool character you can show off.
The in game language is kind of crazy and sometimes I still don’t get all of it. Nub or Newb is short for newbie, Warlock, or running Instances (Dungeons really) with a group of people. The basic point of the game is to be the best of the best. But Blizzard created a way of it not “ending”. They are always coming out with further levels,Well first of all, current is 70, World of Warcraft (or WoW) is an online rpg that you pay a monthy fee to play. There is a story of the game, this is short for Elite. There for, get out some aggression, Troll, and new everything (ie: old level cap was 60, or Shamen) The point of the game is to level your character to the max by completing quests, Mage.