Not really, but I am a fan of pre-rolled numbers. When my rogue was getting up there in levels, I just had a excell sheet of pre-rolled 8d6 since he had 5 attacks in a round. So it was easier to roll a d20, then a d4, but even then it got funky with everybody's bonuses to damage floating around. I also encourage this for the ninja playing in my game. No so much for the wizards since that their big spell going off and its enjoyable to count up all those little dice. Plus it really is a time and fun saver.