as for a casual gamer who have a job, it is quite hard to fork out 6-7 hours daily for WoW. Although yes, it might be addicting but you might get too tired to go on on the 3rd or forth hour. You will need rest eventually.

anyhow, replying to the topic, imho, its true its the best thing to roll for a char that can fit into a group of friends that can stand alone for 5-man , i can imagine that would be extremely interesting. However, you cant doubt that you need to take into account your playing style. Most importantly you have to enjoy it. Its a game afterall isnt it?