if you want the experience to take longer there is one simple thing you have to do....DON'T SKIP CUT SCENES! I mean I did watch the majority of scenes during my first character's level up (and I am talking about the normal one everyone gets, not the class ones that you really SHOULD watch), and for my Warrior I have skipped the vast majority and have noticed it has taken substantially less time to progress in levels. Simply stated, if you want to grind, grind through the cut scenes!