I have personaly created around 4 campains for my freinds who I had to teach every rule. Only one of the players in our community has made a campain... and it sucked.
Correct me If im wrong but these are what i considre the most important to a good campain and dming.
(1) Narrative whit, being able and constantly describing in a way that transports the PCS into a fantasic world. [excuse the cornyness] Making a world of slashing goblins heads off instead of "you do 1 damage, it dies"
(2) The pcs know how the rules and are involved. In most of my campains people will goof around and joke.
(3) And finaly have a good enviroment of light candles, gargoyle fountains, and those electric ball things. In other words i like a good playing enviroment.