Well it's your decision, but mainly after I play divine divinity a few times (which I have done) I like to explore the places that are -forbidden-.

Like when I found Joram north of Verdistis I was overjoyed <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />

So, I like to play the game properly the first time, finish off the remaining side-quests the second time, and afterwards I like to break into the secret areas <img src="/ubbthreads/images/graemlins/evilgrin1.gif" alt="" />