If you could go to sleep tonight, and wake up tomorrow as your main in Azeroth, would you go for it (no switching back and forth)?
Things to think about:
That would mean fighting dragons, fighting Deathwing, the Lich King, Rock Elementals, Enemy Warlocks.
We would assume you would be skilled and know how to control yourself
You would start in Vanilla Lore and work your way through BC -> WotLK -> Cataclysm (but with no awareness of whats coming next)
If you die, you can find your body to come back, however you also feel all the pain of battle/dieing etc. etc.
No need to worry about fatigue/energy when fighting/running a lot
You would work through dungeons and raids with a group of 25 "heroes" which would be your guildmates with reflective personalities from RL
Just use your imagination to fill in anything else, I think I covered the main points.
Anyway my main is a mage....and I think it would be fun, but honestly I like real life too much. I will stay on Earth